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Why Can't We Regrow Teeth?
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Metspitzer
May 22, 2013, 8:07:32 PM5/22/13
to
Ron O
May 24, 2013, 7:09:22 AM5/24/13
to
On May 22, 7:07�pm, Metspitzer <Kilow...@charter.net> wrote:
> http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
There was an ancestor in our lineage that probably had a short enough
lifespan and a diet that they did not require more than two sets of
teeth, and the ability to regrow multiple replacements was lost.
My guess is that the lack of stem cells is a consequence of not
needing them. If selection pressure isn't great enough structures
will not be maintained. You just have to be better than your
competition.
Ron Okimoto
> http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
There was an ancestor in our lineage that probably had a short enough
lifespan and a diet that they did not require more than two sets of
teeth, and the ability to regrow multiple replacements was lost.
My guess is that the lack of stem cells is a consequence of not
needing them. If selection pressure isn't great enough structures
will not be maintained. You just have to be better than your
competition.
Ron Okimoto
jillery
May 24, 2013, 8:13:16 AM5/24/13
to
On Fri, 24 May 2013 04:09:22 -0700 (PDT), Ron O <roki...@cox.net>
wrote:
It's my understanding that growing new teeth is associated with tooth
complexity. Look inside the mouths of sharks and alligator, and the
teeth are all pretty much the same shape. Look inside the mouths of
mammals, and tooth shape has remarkable diversity. Some mammals have
some teeth that grow continuously, like rodents and hippos, but that's
not the same as tooth replacement, and only some of their teeth do
that.
wrote:
complexity. Look inside the mouths of sharks and alligator, and the
teeth are all pretty much the same shape. Look inside the mouths of
mammals, and tooth shape has remarkable diversity. Some mammals have
some teeth that grow continuously, like rodents and hippos, but that's
not the same as tooth replacement, and only some of their teeth do
that.
Bob Casanova
May 24, 2013, 2:05:52 PM5/24/13
to
On Fri, 24 May 2013 08:13:16 -0400, the following appeared
in talk.origins, posted by jillery <69jp...@gmail.com>:
>On Fri, 24 May 2013 04:09:22 -0700 (PDT), Ron O <roki...@cox.net>
>wrote:
>
>>On May 22, 7:07�pm, Metspitzer <Kilow...@charter.net> wrote:
>>> http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
>>
>>There was an ancestor in our lineage that probably had a short enough
>>lifespan and a diet that they did not require more than two sets of
>>teeth, and the ability to regrow multiple replacements was lost.
>>
>>My guess is that the lack of stem cells is a consequence of not
>>needing them. If selection pressure isn't great enough structures
>>will not be maintained. You just have to be better than your
>>competition.
>
>
>It's my understanding that growing new teeth is associated with tooth
>complexity. Look inside the mouths of sharks and alligator, and the
>teeth are all pretty much the same shape. Look inside the mouths of
>mammals, and tooth shape has remarkable diversity.
Sounds reasonable. Aside from the observation that this is
so, is there any info regarding a possible reason, other
than that given by Ron?
> Some mammals have
>some teeth that grow continuously, like rodents and hippos, but that's
>not the same as tooth replacement, and only some of their teeth do
>that.
When this trait shows up in human canine teeth we make up
scary stories about the owners. Think of it as stokering
paranoia...
--
Bob C.
"The most exciting phrase to hear in science,
the one that heralds new discoveries, is not
'Eureka!' but 'That's funny...'"
- Isaac Asimov
in talk.origins, posted by jillery <69jp...@gmail.com>:
>On Fri, 24 May 2013 04:09:22 -0700 (PDT), Ron O <roki...@cox.net>
>wrote:
>
>>On May 22, 7:07�pm, Metspitzer <Kilow...@charter.net> wrote:
>>> http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
>>
>>There was an ancestor in our lineage that probably had a short enough
>>lifespan and a diet that they did not require more than two sets of
>>teeth, and the ability to regrow multiple replacements was lost.
>>
>>My guess is that the lack of stem cells is a consequence of not
>>needing them. If selection pressure isn't great enough structures
>>will not be maintained. You just have to be better than your
>>competition.
>
>
>It's my understanding that growing new teeth is associated with tooth
>complexity. Look inside the mouths of sharks and alligator, and the
>teeth are all pretty much the same shape. Look inside the mouths of
>mammals, and tooth shape has remarkable diversity.
so, is there any info regarding a possible reason, other
than that given by Ron?
> Some mammals have
>some teeth that grow continuously, like rodents and hippos, but that's
>not the same as tooth replacement, and only some of their teeth do
>that.
scary stories about the owners. Think of it as stokering
paranoia...
--
Bob C.
"The most exciting phrase to hear in science,
the one that heralds new discoveries, is not
'Eureka!' but 'That's funny...'"
- Isaac Asimov
jillery
May 24, 2013, 2:50:57 PM5/24/13
to
On Fri, 24 May 2013 11:05:52 -0700, Bob Casanova <nos...@buzz.off>
wrote:
>On Fri, 24 May 2013 08:13:16 -0400, the following appeared
>in talk.origins, posted by jillery <69jp...@gmail.com>:
>
>>On Fri, 24 May 2013 04:09:22 -0700 (PDT), Ron O <roki...@cox.net>
>>wrote:
>>
>>>On May 22, 7:07�pm, Metspitzer <Kilow...@charter.net> wrote:
>>>> http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
>>>
>>>There was an ancestor in our lineage that probably had a short enough
>>>lifespan and a diet that they did not require more than two sets of
>>>teeth, and the ability to regrow multiple replacements was lost.
>>>
>>>My guess is that the lack of stem cells is a consequence of not
>>>needing them. If selection pressure isn't great enough structures
>>>will not be maintained. You just have to be better than your
>>>competition.
>>
>>
>>It's my understanding that growing new teeth is associated with tooth
>>complexity. Look inside the mouths of sharks and alligator, and the
>>teeth are all pretty much the same shape. Look inside the mouths of
>>mammals, and tooth shape has remarkable diversity.
>
>Sounds reasonable. Aside from the observation that this is
>so, is there any info regarding a possible reason, other
>than that given by Ron?
I might have read this somewhere, but it's most likely just my
inexpert impression, that carnassial teeth require the uppers and
lowers to have a good fit in order to work, and that becomes hard to
do if either go missing regularly. I understand there's a functional
tradeoff between shearing teeth and replaceable teeth.
>> Some mammals have
>>some teeth that grow continuously, like rodents and hippos, but that's
>>not the same as tooth replacement, and only some of their teeth do
>>that.
>
>When this trait shows up in human canine teeth we make up
>scary stories about the owners. Think of it as stokering
>paranoia...
Bram makes for lousy lullabies.
wrote:
>On Fri, 24 May 2013 08:13:16 -0400, the following appeared
>in talk.origins, posted by jillery <69jp...@gmail.com>:
>
>>On Fri, 24 May 2013 04:09:22 -0700 (PDT), Ron O <roki...@cox.net>
>>wrote:
>>
>>>On May 22, 7:07�pm, Metspitzer <Kilow...@charter.net> wrote:
>>>> http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
>>>
>>>There was an ancestor in our lineage that probably had a short enough
>>>lifespan and a diet that they did not require more than two sets of
>>>teeth, and the ability to regrow multiple replacements was lost.
>>>
>>>My guess is that the lack of stem cells is a consequence of not
>>>needing them. If selection pressure isn't great enough structures
>>>will not be maintained. You just have to be better than your
>>>competition.
>>
>>
>>It's my understanding that growing new teeth is associated with tooth
>>complexity. Look inside the mouths of sharks and alligator, and the
>>teeth are all pretty much the same shape. Look inside the mouths of
>>mammals, and tooth shape has remarkable diversity.
>
>Sounds reasonable. Aside from the observation that this is
>so, is there any info regarding a possible reason, other
>than that given by Ron?
inexpert impression, that carnassial teeth require the uppers and
lowers to have a good fit in order to work, and that becomes hard to
do if either go missing regularly. I understand there's a functional
tradeoff between shearing teeth and replaceable teeth.
>> Some mammals have
>>some teeth that grow continuously, like rodents and hippos, but that's
>>not the same as tooth replacement, and only some of their teeth do
>>that.
>
>When this trait shows up in human canine teeth we make up
>scary stories about the owners. Think of it as stokering
>paranoia...
Ron O
May 24, 2013, 5:08:57 PM5/24/13
to
On May 24, 1:50嚙緘m, jillery <69jpi...@gmail.com> wrote:
> On Fri, 24 May 2013 11:05:52 -0700, Bob Casanova <nos...@buzz.off>
> wrote:
>
>
>
>
>
>
>
>
>
> >On Fri, 24 May 2013 08:13:16 -0400, the following appeared
> >in talk.origins, posted by jillery <69jpi...@gmail.com>:
> On Fri, 24 May 2013 11:05:52 -0700, Bob Casanova <nos...@buzz.off>
> wrote:
>
>
>
>
>
>
>
>
>
> >On Fri, 24 May 2013 08:13:16 -0400, the following appeared
>
> >>On Fri, 24 May 2013 04:09:22 -0700 (PDT), Ron O <rokim...@cox.net>
> >>wrote:
>
> >>>On May 22, 7:07嚙緘m, Metspitzer <Kilow...@charter.net> wrote:
> >>>>http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
>
> >>>There was an ancestor in our lineage that probably had a short enough
> >>>lifespan and a diet that they did not require more than two sets of
> >>>teeth, and the ability to regrow multiple replacements was lost.
>
> >>>My guess is that the lack of stem cells is a consequence of not
> >>>needing them. 嚙瘢f selection pressure isn't great enough structures
> >>>On May 22, 7:07嚙緘m, Metspitzer <Kilow...@charter.net> wrote:
> >>>>http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
>
> >>>There was an ancestor in our lineage that probably had a short enough
> >>>lifespan and a diet that they did not require more than two sets of
> >>>teeth, and the ability to regrow multiple replacements was lost.
>
> >>>My guess is that the lack of stem cells is a consequence of not
> >>>will not be maintained. 嚙磐ou just have to be better than your
> >>>competition.
>
> >>It's my understanding that growing new teeth is associated with tooth
> >>complexity. 嚙盤ook inside the mouths of sharks and alligator, and the
>
> >>It's my understanding that growing new teeth is associated with tooth
> >>teeth are all pretty much the same shape. 嚙盤ook inside the mouths of
> >>mammals, and tooth shape has remarkable diversity.
>
> >Sounds reasonable. Aside from the observation that this is
> >so, is there any info regarding a possible reason, other
> >than that given by Ron?
>
> I might have read this somewhere, but it's most likely just my
> inexpert impression, that carnassial teeth require the uppers and
> lowers to have a good fit in order to work, and that becomes hard to
> do if either go missing regularly. 嚙瘢 understand there's a functional
>
> >Sounds reasonable. Aside from the observation that this is
> >so, is there any info regarding a possible reason, other
> >than that given by Ron?
>
> I might have read this somewhere, but it's most likely just my
> inexpert impression, that carnassial teeth require the uppers and
> lowers to have a good fit in order to work, and that becomes hard to
> tradeoff between shearing teeth and replaceable teeth.
I've heard that elephants replace their teeth half a dozen times in
their lives and still run out and starve to death when they wear out
their last grinding molars.
Ron Okimoto
>
> >> 嚙磅ome mammals have
Burkhard
May 24, 2013, 6:00:42 PM5/24/13
to
On May 24, 7:50嚙緘m, jillery <69jpi...@gmail.com> wrote:
> On Fri, 24 May 2013 11:05:52 -0700, Bob Casanova <nos...@buzz.off>
> wrote:
>
>
>
>
>
>
>
>
>
> >On Fri, 24 May 2013 08:13:16 -0400, the following appeared
> >in talk.origins, posted by jillery <69jpi...@gmail.com>:
> On Fri, 24 May 2013 11:05:52 -0700, Bob Casanova <nos...@buzz.off>
> wrote:
>
>
>
>
>
>
>
>
>
> >On Fri, 24 May 2013 08:13:16 -0400, the following appeared
>
> >>On Fri, 24 May 2013 04:09:22 -0700 (PDT), Ron O <rokim...@cox.net>
> >>wrote:
>
> >>>On May 22, 7:07嚙緘m, Metspitzer <Kilow...@charter.net> wrote:
> >>>>http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
>
> >>>There was an ancestor in our lineage that probably had a short enough
> >>>lifespan and a diet that they did not require more than two sets of
> >>>teeth, and the ability to regrow multiple replacements was lost.
>
> >>>My guess is that the lack of stem cells is a consequence of not
> >>>needing them. 嚙瘢f selection pressure isn't great enough structures
> >>>On May 22, 7:07嚙緘m, Metspitzer <Kilow...@charter.net> wrote:
> >>>>http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
>
> >>>There was an ancestor in our lineage that probably had a short enough
> >>>lifespan and a diet that they did not require more than two sets of
> >>>teeth, and the ability to regrow multiple replacements was lost.
>
> >>>My guess is that the lack of stem cells is a consequence of not
> >>>will not be maintained. 嚙磐ou just have to be better than your
> >>>competition.
>
> >>It's my understanding that growing new teeth is associated with tooth
> >>complexity. 嚙盤ook inside the mouths of sharks and alligator, and the
>
> >>It's my understanding that growing new teeth is associated with tooth
> >>teeth are all pretty much the same shape. 嚙盤ook inside the mouths of
> >>mammals, and tooth shape has remarkable diversity.
>
> >Sounds reasonable. Aside from the observation that this is
> >so, is there any info regarding a possible reason, other
> >than that given by Ron?
>
> I might have read this somewhere, but it's most likely just my
> inexpert impression, that carnassial teeth require the uppers and
> lowers to have a good fit in order to work, and that becomes hard to
> do if either go missing regularly. 嚙瘢 understand there's a functional
>
> >Sounds reasonable. Aside from the observation that this is
> >so, is there any info regarding a possible reason, other
> >than that given by Ron?
>
> I might have read this somewhere, but it's most likely just my
> inexpert impression, that carnassial teeth require the uppers and
> lowers to have a good fit in order to work, and that becomes hard to
> tradeoff between shearing teeth and replaceable teeth.
>
> >> 嚙磅ome mammals have
>
> >>some teeth that grow continuously, like rodents and hippos, but that's
> >>not the same as tooth replacement, and only some of their teeth do
> >>that.
>
> >When this trait shows up in human canine teeth we make up
> >scary stories about the owners. Think of it as stokering
> >paranoia...
>
> Bram makes for lousy lullabies.
Sleep now my precious
> >>not the same as tooth replacement, and only some of their teeth do
> >>that.
>
> >When this trait shows up in human canine teeth we make up
> >scary stories about the owners. Think of it as stokering
> >paranoia...
>
> Bram makes for lousy lullabies.
Hidden from light
Sleep little vampire child
We'll rise at dusk and rule by night
We're all that is pure and bright.
Paul J Gans
May 24, 2013, 6:37:15 PM5/24/13
to
Bob Casanova <nos...@buzz.off> wrote:
>On Fri, 24 May 2013 08:13:16 -0400, the following appeared
>in talk.origins, posted by jillery <69jp...@gmail.com>:
>>On Fri, 24 May 2013 04:09:22 -0700 (PDT), Ron O <roki...@cox.net>
>>wrote:
>>
>On Fri, 24 May 2013 08:13:16 -0400, the following appeared
>in talk.origins, posted by jillery <69jp...@gmail.com>:
>>On Fri, 24 May 2013 04:09:22 -0700 (PDT), Ron O <roki...@cox.net>
>>wrote:
>>
>>>On May 22, 7:07?pm, Metspitzer <Kilow...@charter.net> wrote:
>>>> http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
>>>
>>>There was an ancestor in our lineage that probably had a short enough
>>>lifespan and a diet that they did not require more than two sets of
>>>teeth, and the ability to regrow multiple replacements was lost.
>>>
>>>My guess is that the lack of stem cells is a consequence of not
>>>needing them. If selection pressure isn't great enough structures
>>>will not be maintained. You just have to be better than your
>>>competition.
>>
>>
>>It's my understanding that growing new teeth is associated with tooth
>>complexity. Look inside the mouths of sharks and alligator, and the
>>teeth are all pretty much the same shape. Look inside the mouths of
>>mammals, and tooth shape has remarkable diversity.
>Sounds reasonable. Aside from the observation that this is
>so, is there any info regarding a possible reason, other
>than that given by Ron?
>> Some mammals have
>>some teeth that grow continuously, like rodents and hippos, but that's
>>not the same as tooth replacement, and only some of their teeth do
>>that.
>When this trait shows up in human canine teeth we make up
>scary stories about the owners. Think of it as stokering
>paranoia...
I thought Bram was good for you?
>>>> http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
>>>
>>>There was an ancestor in our lineage that probably had a short enough
>>>lifespan and a diet that they did not require more than two sets of
>>>teeth, and the ability to regrow multiple replacements was lost.
>>>
>>>My guess is that the lack of stem cells is a consequence of not
>>>needing them. If selection pressure isn't great enough structures
>>>will not be maintained. You just have to be better than your
>>>competition.
>>
>>
>>It's my understanding that growing new teeth is associated with tooth
>>complexity. Look inside the mouths of sharks and alligator, and the
>>teeth are all pretty much the same shape. Look inside the mouths of
>>mammals, and tooth shape has remarkable diversity.
>Sounds reasonable. Aside from the observation that this is
>so, is there any info regarding a possible reason, other
>than that given by Ron?
>> Some mammals have
>>some teeth that grow continuously, like rodents and hippos, but that's
>>not the same as tooth replacement, and only some of their teeth do
>>that.
>When this trait shows up in human canine teeth we make up
>scary stories about the owners. Think of it as stokering
>paranoia...
--
--- Paul J. Gans
Burkhard
May 24, 2013, 7:34:24 PM5/24/13
to
On May 24, 11:37�pm, Paul J Gans <gan...@panix.com> wrote:
> Bob Casanova <nos...@buzz.off> wrote:
> >On Fri, 24 May 2013 08:13:16 -0400, the following appeared
> >in talk.origins, posted by jillery <69jpi...@gmail.com>:
> Bob Casanova <nos...@buzz.off> wrote:
> >On Fri, 24 May 2013 08:13:16 -0400, the following appeared
> >>On Fri, 24 May 2013 04:09:22 -0700 (PDT), Ron O <rokim...@cox.net>
Paul J Gans
May 24, 2013, 8:21:58 PM5/24/13
to
Burkhard <b.sc...@ed.ac.uk> wrote:
>> >>>will not be maintained. ?You just have to be better than your
>> >>teeth are all pretty much the same shape. ?Look inside the mouths of
this thread over the top and suitable for moonless nights only.
>On May 24, 11:37?pm, Paul J Gans <gan...@panix.com> wrote:
>> Bob Casanova <nos...@buzz.off> wrote:
>> >On Fri, 24 May 2013 08:13:16 -0400, the following appeared
>> >in talk.origins, posted by jillery <69jpi...@gmail.com>:
>> >>On Fri, 24 May 2013 04:09:22 -0700 (PDT), Ron O <rokim...@cox.net>
>> >>wrote:
>>
>> >>>On May 22, 7:07?pm, Metspitzer <Kilow...@charter.net> wrote:
>> >>>>http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
>>
>> >>>There was an ancestor in our lineage that probably had a short enough
>> >>>lifespan and a diet that they did not require more than two sets of
>> >>>teeth, and the ability to regrow multiple replacements was lost.
>>
>> >>>My guess is that the lack of stem cells is a consequence of not
>> >>>needing them. ?If selection pressure isn't great enough structures
>> Bob Casanova <nos...@buzz.off> wrote:
>> >On Fri, 24 May 2013 08:13:16 -0400, the following appeared
>> >in talk.origins, posted by jillery <69jpi...@gmail.com>:
>> >>On Fri, 24 May 2013 04:09:22 -0700 (PDT), Ron O <rokim...@cox.net>
>> >>wrote:
>>
>> >>>On May 22, 7:07?pm, Metspitzer <Kilow...@charter.net> wrote:
>> >>>>http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
>>
>> >>>There was an ancestor in our lineage that probably had a short enough
>> >>>lifespan and a diet that they did not require more than two sets of
>> >>>teeth, and the ability to regrow multiple replacements was lost.
>>
>> >>>My guess is that the lack of stem cells is a consequence of not
>> >>>will not be maintained. ?You just have to be better than your
>> >>>competition.
>>
>> >>It's my understanding that growing new teeth is associated with tooth
>> >>complexity. ?Look inside the mouths of sharks and alligator, and the
>>
>> >>It's my understanding that growing new teeth is associated with tooth
>> >>teeth are all pretty much the same shape. ?Look inside the mouths of
>> >>mammals, and tooth shape has remarkable diversity.
>> >Sounds reasonable. Aside from the observation that this is
>> >so, is there any info regarding a possible reason, other
>> >than that given by Ron?
>> >> ?Some mammals have
>> >Sounds reasonable. Aside from the observation that this is
>> >so, is there any info regarding a possible reason, other
>> >than that given by Ron?
>> >>some teeth that grow continuously, like rodents and hippos, but that's
>> >>not the same as tooth replacement, and only some of their teeth do
>> >>that.
>> >When this trait shows up in human canine teeth we make up
>> >scary stories about the owners. Think of it as stokering
>> >paranoia...
>>
>> I thought Bram was good for you?
>>
>> --
>I need a Bram, a Bram for my Mather......
By the power vested in me by nobody in particular, I declare
>> >>not the same as tooth replacement, and only some of their teeth do
>> >>that.
>> >When this trait shows up in human canine teeth we make up
>> >scary stories about the owners. Think of it as stokering
>> >paranoia...
>>
>> I thought Bram was good for you?
>>
>> --
>I need a Bram, a Bram for my Mather......
this thread over the top and suitable for moonless nights only.
William Morse
May 25, 2013, 12:39:53 AM5/25/13
to
knowledge?) seems to indicate that you are right about the tradeoff ,
and mammals early on rejected replaceable teeth. A very few lineages
have since reacquired replaceable teeth.
Mark Isaak
May 24, 2013, 11:37:19 PM5/24/13
to
>> I need a Bram, a Bram for my Mather......
>
> By the power vested in me by nobody in particular, I declare
> this thread over the top and suitable for moonless nights only.
Have you gone batty? "Over the top" threads are just the sort we like
>
> By the power vested in me by nobody in particular, I declare
> this thread over the top and suitable for moonless nights only.
to sink our teeth into.
--
Mark Isaak eciton (at) curioustaxonomy (dot) net
"It is certain, from experience, that the smallest grain of natural
honesty and benevolence has more effect on men's conduct, than the most
pompous views suggested by theological theories and systems." - D. Hume
jillery
May 25, 2013, 1:08:04 AM5/25/13
to
On Fri, 24 May 2013 14:08:57 -0700 (PDT), Ron O <roki...@cox.net>
wrote:
>On May 24, 1:50锟絧m, jillery <69jpi...@gmail.com> wrote:
>> On Fri, 24 May 2013 11:05:52 -0700, Bob Casanova <nos...@buzz.off>
>> wrote:
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> >On Fri, 24 May 2013 08:13:16 -0400, the following appeared
>> >in talk.origins, posted by jillery <69jpi...@gmail.com>:
>>
>> >>On Fri, 24 May 2013 04:09:22 -0700 (PDT), Ron O <rokim...@cox.net>
>> >>wrote:
>>
>> >>>will not be maintained. 锟結ou just have to be better than your
>> >>teeth are all pretty much the same shape. 锟絃ook inside the mouths of
the older molars forward as they wear over time, until they reach the
front and drop out.
I've heard that horses also modify the "standard" mammal tooth model,
which grow exceptionally long teeth that slowly rise above the gumline
over time.
And then there's baleen whales, which toss out all the mammal tooth
rules.
>> >> 锟絊ome mammals have
wrote:
>On May 24, 1:50锟絧m, jillery <69jpi...@gmail.com> wrote:
>> On Fri, 24 May 2013 11:05:52 -0700, Bob Casanova <nos...@buzz.off>
>> wrote:
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> >On Fri, 24 May 2013 08:13:16 -0400, the following appeared
>> >in talk.origins, posted by jillery <69jpi...@gmail.com>:
>>
>> >>On Fri, 24 May 2013 04:09:22 -0700 (PDT), Ron O <rokim...@cox.net>
>> >>wrote:
>>
>> >>>On May 22, 7:07锟絧m, Metspitzer <Kilow...@charter.net> wrote:
>> >>>>http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
>>
>> >>>There was an ancestor in our lineage that probably had a short enough
>> >>>lifespan and a diet that they did not require more than two sets of
>> >>>teeth, and the ability to regrow multiple replacements was lost.
>>
>> >>>My guess is that the lack of stem cells is a consequence of not
>> >>>needing them. 锟絀f selection pressure isn't great enough structures
>> >>>>http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
>>
>> >>>There was an ancestor in our lineage that probably had a short enough
>> >>>lifespan and a diet that they did not require more than two sets of
>> >>>teeth, and the ability to regrow multiple replacements was lost.
>>
>> >>>My guess is that the lack of stem cells is a consequence of not
>> >>>will not be maintained. 锟結ou just have to be better than your
>> >>>competition.
>>
>> >>It's my understanding that growing new teeth is associated with tooth
>> >>complexity. 锟絃ook inside the mouths of sharks and alligator, and the
>>
>> >>It's my understanding that growing new teeth is associated with tooth
>> >>teeth are all pretty much the same shape. 锟絃ook inside the mouths of
>> >>mammals, and tooth shape has remarkable diversity.
>>
>> >Sounds reasonable. Aside from the observation that this is
>> >so, is there any info regarding a possible reason, other
>> >than that given by Ron?
>>
>> I might have read this somewhere, but it's most likely just my
>> inexpert impression, that carnassial teeth require the uppers and
>> lowers to have a good fit in order to work, and that becomes hard to
>> do if either go missing regularly. 锟絀 understand there's a functional
>>
>> >Sounds reasonable. Aside from the observation that this is
>> >so, is there any info regarding a possible reason, other
>> >than that given by Ron?
>>
>> I might have read this somewhere, but it's most likely just my
>> inexpert impression, that carnassial teeth require the uppers and
>> lowers to have a good fit in order to work, and that becomes hard to
>> tradeoff between shearing teeth and replaceable teeth.
>
>I've heard that elephants replace their teeth half a dozen times in
>their lives and still run out and starve to death when they wear out
>their last grinding molars.
I've heard that also, erupting new molars from the back, which push
>
>I've heard that elephants replace their teeth half a dozen times in
>their lives and still run out and starve to death when they wear out
>their last grinding molars.
the older molars forward as they wear over time, until they reach the
front and drop out.
I've heard that horses also modify the "standard" mammal tooth model,
which grow exceptionally long teeth that slowly rise above the gumline
over time.
And then there's baleen whales, which toss out all the mammal tooth
rules.
>> >> 锟絊ome mammals have
SkyEyes
May 25, 2013, 3:53:31 AM5/25/13
to
On May 24, 10:08�pm, jillery <69jpi...@gmail.com> wrote:
> On Fri, 24 May 2013 14:08:57 -0700 (PDT), Ron O <rokim...@cox.net>
> >> >>>will not be maintained. �You just have to be better than your
> >> >>teeth are all pretty much the same shape. �Look inside the mouths of
domestic horses' teeth every so often by a veterinarian. If you don't
do that, the teeth will irritate the animal's cheeks and tongue to the
point it can no longer eat, and will, if not aided, eventually die.
Wild horses do not suffer from this problem because the foods they eat
in the wild are much rougher and often full of sand/grit. This grinds
the teeth down sufficiently.
Brenda Nelson, A.A.#34
skyeyes nine at cox dot net OR
skyeyes nine at yahoo dot com
> On Fri, 24 May 2013 14:08:57 -0700 (PDT), Ron O <rokim...@cox.net>
> wrote:
>
>
>
>
>
>
>
>
>
> >On May 24, 1:50�pm, jillery <69jpi...@gmail.com> wrote:
> >> On Fri, 24 May 2013 11:05:52 -0700, Bob Casanova <nos...@buzz.off>
> >> wrote:
>
> >> >On Fri, 24 May 2013 08:13:16 -0400, the following appeared
> >> >in talk.origins, posted by jillery <69jpi...@gmail.com>:
>
> >> >>On Fri, 24 May 2013 04:09:22 -0700 (PDT), Ron O <rokim...@cox.net>
> >> >>wrote:
>
>
>
>
>
>
>
>
>
>
> >On May 24, 1:50�pm, jillery <69jpi...@gmail.com> wrote:
> >> On Fri, 24 May 2013 11:05:52 -0700, Bob Casanova <nos...@buzz.off>
> >> wrote:
>
> >> >On Fri, 24 May 2013 08:13:16 -0400, the following appeared
> >> >in talk.origins, posted by jillery <69jpi...@gmail.com>:
>
> >> >>On Fri, 24 May 2013 04:09:22 -0700 (PDT), Ron O <rokim...@cox.net>
> >> >>wrote:
>
> >> >>>On May 22, 7:07�pm, Metspitzer <Kilow...@charter.net> wrote:
> >> >>>>http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
>
> >> >>>There was an ancestor in our lineage that probably had a short enough
> >> >>>lifespan and a diet that they did not require more than two sets of
> >> >>>teeth, and the ability to regrow multiple replacements was lost.
>
> >> >>>My guess is that the lack of stem cells is a consequence of not
> >> >>>needing them. �If selection pressure isn't great enough structures
> >> >>>>http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=...
>
> >> >>>There was an ancestor in our lineage that probably had a short enough
> >> >>>lifespan and a diet that they did not require more than two sets of
> >> >>>teeth, and the ability to regrow multiple replacements was lost.
>
> >> >>>My guess is that the lack of stem cells is a consequence of not
> >> >>>will not be maintained. �You just have to be better than your
> >> >>>competition.
>
> >> >>It's my understanding that growing new teeth is associated with tooth
> >> >>complexity. �Look inside the mouths of sharks and alligator, and the
>
> >> >>It's my understanding that growing new teeth is associated with tooth
> >> >>teeth are all pretty much the same shape. �Look inside the mouths of
> >> >>mammals, and tooth shape has remarkable diversity.
>
> >> >Sounds reasonable. Aside from the observation that this is
> >> >so, is there any info regarding a possible reason, other
> >> >than that given by Ron?
>
> >> I might have read this somewhere, but it's most likely just my
> >> inexpert impression, that carnassial teeth require the uppers and
> >> lowers to have a good fit in order to work, and that becomes hard to
> >> do if either go missing regularly. �I understand there's a functional
>
> >> >Sounds reasonable. Aside from the observation that this is
> >> >so, is there any info regarding a possible reason, other
> >> >than that given by Ron?
>
> >> I might have read this somewhere, but it's most likely just my
> >> inexpert impression, that carnassial teeth require the uppers and
> >> lowers to have a good fit in order to work, and that becomes hard to
> >> tradeoff between shearing teeth and replaceable teeth.
>
> >I've heard that elephants replace their teeth half a dozen times in
> >their lives and still run out and starve to death when they wear out
> >their last grinding molars.
>
> I've heard that also, erupting new molars from the back, which push
> the older molars forward as they wear over time, until they reach the
> front and drop out.
>
> I've heard that horses also modify the "standard" mammal tooth model,
> which grow exceptionally long teeth that slowly rise above the gumline
> over time.
This is true. It's what necessitates the "floating" (filing down) of
>
> >I've heard that elephants replace their teeth half a dozen times in
> >their lives and still run out and starve to death when they wear out
> >their last grinding molars.
>
> I've heard that also, erupting new molars from the back, which push
> the older molars forward as they wear over time, until they reach the
> front and drop out.
>
> I've heard that horses also modify the "standard" mammal tooth model,
> which grow exceptionally long teeth that slowly rise above the gumline
> over time.
domestic horses' teeth every so often by a veterinarian. If you don't
do that, the teeth will irritate the animal's cheeks and tongue to the
point it can no longer eat, and will, if not aided, eventually die.
Wild horses do not suffer from this problem because the foods they eat
in the wild are much rougher and often full of sand/grit. This grinds
the teeth down sufficiently.
Brenda Nelson, A.A.#34
skyeyes nine at cox dot net OR
skyeyes nine at yahoo dot com
jillery
May 25, 2013, 4:23:17 AM5/25/13
to
On Sat, 25 May 2013 00:53:31 -0700 (PDT), SkyEyes <skye...@cox.net>
wrote:
That has to be a painful and slow way to go. And I thought humans had
it bad with impacted wisdom teeth.
>Wild horses do not suffer from this problem because the foods they eat
>in the wild are much rougher and often full of sand/grit. This grinds
>the teeth down sufficiently.
No doubt short grass has lots of exterior grit from the soil. But I
heard that grasses embed abrasive minerals as part of their cell
structure. I don't know if that's true.
A similar thing happens to rodents that can't gnaw, but for different
reasons. In their case, their incisors grow continuously.
wrote:
it bad with impacted wisdom teeth.
>Wild horses do not suffer from this problem because the foods they eat
>in the wild are much rougher and often full of sand/grit. This grinds
>the teeth down sufficiently.
heard that grasses embed abrasive minerals as part of their cell
structure. I don't know if that's true.
A similar thing happens to rodents that can't gnaw, but for different
reasons. In their case, their incisors grow continuously.
Richard Norman
May 25, 2013, 8:44:19 AM5/25/13
to
On Sat, 25 May 2013 04:23:17 -0400, jillery <69jp...@gmail.com>
wrote:
<snip to isolate the question of tooth wear>
>>Wild horses do not suffer from this problem because the foods they eat
>>in the wild are much rougher and often full of sand/grit. This grinds
>>the teeth down sufficiently.
>
>
>No doubt short grass has lots of exterior grit from the soil. But I
>heard that grasses embed abrasive minerals as part of their cell
>structure. I don't know if that's true.
Grasses, as do many other plants, indeed produce silicaceous particles
that can cause extensive tooth wear in grazing animals. The particles,
phytoliths, serve many functions in plants beyond protecting against
grazing. See the Wikipedia article
http://en.wikipedia.org/wiki/Phytolith#Functions
However grasses have an exceptionally large number and abrasiveness of
these particles and it seems clear that this group may well have
specialized to use those particles as a defense especially since
monocots seems to produce far fewer secondary plant products (chemical
defenses against predation) than dicots. An experimental test of the
adaptive significance of silica in grasses is the paper "Grass leaf
silicification: Natural selection for an inducible defense
against herbivores"
http://www.pnas.org/content/80/3/790.full.pdf
This should be enough to move the hypothesis from 'just-so" to "pretty
clearly established" status.
wrote:
<snip to isolate the question of tooth wear>
>>Wild horses do not suffer from this problem because the foods they eat
>>in the wild are much rougher and often full of sand/grit. This grinds
>>the teeth down sufficiently.
>
>
>No doubt short grass has lots of exterior grit from the soil. But I
>heard that grasses embed abrasive minerals as part of their cell
>structure. I don't know if that's true.
that can cause extensive tooth wear in grazing animals. The particles,
phytoliths, serve many functions in plants beyond protecting against
grazing. See the Wikipedia article
http://en.wikipedia.org/wiki/Phytolith#Functions
However grasses have an exceptionally large number and abrasiveness of
these particles and it seems clear that this group may well have
specialized to use those particles as a defense especially since
monocots seems to produce far fewer secondary plant products (chemical
defenses against predation) than dicots. An experimental test of the
adaptive significance of silica in grasses is the paper "Grass leaf
silicification: Natural selection for an inducible defense
against herbivores"
http://www.pnas.org/content/80/3/790.full.pdf
This should be enough to move the hypothesis from 'just-so" to "pretty
clearly established" status.
Ron O
May 25, 2013, 8:47:56 AM5/25/13
to
jillery
May 25, 2013, 9:54:19 AM5/25/13
to
jillery
May 25, 2013, 9:55:55 AM5/25/13
to
Ron O
May 25, 2013, 1:17:44 PM5/25/13
to
On May 25, 8:54�am, jillery <69jpi...@gmail.com> wrote:
> On Sat, 25 May 2013 05:47:56 -0700 (PDT), Ron O <rokim...@cox.net>
Just following the vein to the heart of the matter.
> On Sat, 25 May 2013 05:47:56 -0700 (PDT), Ron O <rokim...@cox.net>
Bob Casanova
May 25, 2013, 1:53:37 PM5/25/13
to
On Fri, 24 May 2013 14:50:57 -0400, the following appeared
OK.
>>> Some mammals have
>>>some teeth that grow continuously, like rodents and hippos, but that's
>>>not the same as tooth replacement, and only some of their teeth do
>>>that.
>>
>>When this trait shows up in human canine teeth we make up
>>scary stories about the owners. Think of it as stokering
>>paranoia...
>
>
>Bram makes for lousy lullabies.
....but good flakes, especially with raisins.
>>> Some mammals have
>>>some teeth that grow continuously, like rodents and hippos, but that's
>>>not the same as tooth replacement, and only some of their teeth do
>>>that.
>>
>>When this trait shows up in human canine teeth we make up
>>scary stories about the owners. Think of it as stokering
>>paranoia...
>
>
>Bram makes for lousy lullabies.
Bob Casanova
May 25, 2013, 1:54:57 PM5/25/13
to
On Fri, 24 May 2013 22:37:15 +0000 (UTC), the following
appeared in talk.origins, posted by Paul J Gans
<gan...@panix.com>:
It can certainly lead to loose bowels, especially at night.
appeared in talk.origins, posted by Paul J Gans
<gan...@panix.com>:
Bob Casanova
May 25, 2013, 1:58:26 PM5/25/13
to
On Sat, 25 May 2013 10:17:44 -0700 (PDT), the following
appeared in talk.origins, posted by Ron O
<roki...@cox.net>:
The whole conversation is too artery-fartery for me.
appeared in talk.origins, posted by Ron O
<roki...@cox.net>:
Bob Casanova
May 25, 2013, 1:57:20 PM5/25/13
to
On Sat, 25 May 2013 09:54:19 -0400, the following appeared
in talk.origins, posted by jillery <69jp...@gmail.com>:
Yeah, it's enough to drive one batty.
in talk.origins, posted by jillery <69jp...@gmail.com>:
James Beck
May 25, 2013, 3:31:57 PM5/25/13
to
On Sat, 25 May 2013 05:47:56 -0700 (PDT), Ron O <roki...@cox.net>
wrote:
Molare, oh oh
Maxillare, oh oh oh oh
A me, superiore
Felice di stare lassu
Masticare, mangiare felice
Piu in alto del sole ed ancora piu su
Mentre il fagioli pian piano spariva lontano laggiu
Una musica dolce suonava soltanto per me
wrote:
Maxillare, oh oh oh oh
A me, superiore
Felice di stare lassu
Masticare, mangiare felice
Piu in alto del sole ed ancora piu su
Mentre il fagioli pian piano spariva lontano laggiu
Una musica dolce suonava soltanto per me
John S. Wilkins
May 26, 2013, 1:03:15 AM5/26/13
to
Bob Casanova <nos...@buzz.off> wrote:
> On Sat, 25 May 2013 10:17:44 -0700 (PDT), the following
> appeared in talk.origins, posted by Ron O
> <roki...@cox.net>:
>
> >On May 25, 8:54 am, jillery <69jpi...@gmail.com> wrote:
> >> On Sat, 25 May 2013 05:47:56 -0700 (PDT), Ron O <rokim...@cox.net>
> >> wrote:
> >>
> >> >On May 24, 10:37 pm, Mark Isaak <eci...@curioustax.onomy.net> wrote:
> >> >> On 5/24/13 5:21 PM, Paul J Gans wrote:
> >>
> >> >> > Burkhard <b.scha...@ed.ac.uk> wrote:
> >> >> >> On May 24, 11:37?pm, Paul J Gans <gan...@panix.com> wrote:
> >> >> >>> Bob Casanova <nos...@buzz.off> wrote:
...
> On Sat, 25 May 2013 10:17:44 -0700 (PDT), the following
> appeared in talk.origins, posted by Ron O
> <roki...@cox.net>:
>
> >On May 25, 8:54 am, jillery <69jpi...@gmail.com> wrote:
> >> On Sat, 25 May 2013 05:47:56 -0700 (PDT), Ron O <rokim...@cox.net>
> >> wrote:
> >>
> >> >On May 24, 10:37 pm, Mark Isaak <eci...@curioustax.onomy.net> wrote:
> >> >> On 5/24/13 5:21 PM, Paul J Gans wrote:
> >>
> >> >> > Burkhard <b.scha...@ed.ac.uk> wrote:
> >> >> >> On May 24, 11:37?pm, Paul J Gans <gan...@panix.com> wrote:
> >> >> >>> Bob Casanova <nos...@buzz.off> wrote:
> >> >> >>>> When this trait shows up in human canine teeth we make up
> >> >> >>>> scary stories about the owners. Think of it as stokering
> >> >> >>>> paranoia...
> >>
> >> >> >>> I thought Bram was good for you?
> >>
> >> >> >> I need a Bram, a Bram for my Mather......
> >>
> >> >> > By the power vested in me by nobody in particular, I declare
> >> >> > this thread over the top and suitable for moonless nights only.
> >>
> >> >> Have you gone batty? "Over the top" threads are just the sort we like
> >> >> to sink our teeth into.
> >>
> >> >Incissive.
> >>
> >> Bloody pun cascade.
> >
> >Just following the vein to the heart of the matter.
>
> The whole conversation is too artery-fartery for me.
A lot's at stake.
> >> >> >>>> scary stories about the owners. Think of it as stokering
> >> >> >>>> paranoia...
> >>
> >> >> >>> I thought Bram was good for you?
> >>
> >> >> >> I need a Bram, a Bram for my Mather......
> >>
> >> >> > By the power vested in me by nobody in particular, I declare
> >> >> > this thread over the top and suitable for moonless nights only.
> >>
> >> >> Have you gone batty? "Over the top" threads are just the sort we like
> >> >> to sink our teeth into.
> >>
> >> >Incissive.
> >>
> >> Bloody pun cascade.
> >
> >Just following the vein to the heart of the matter.
>
> The whole conversation is too artery-fartery for me.
--
John S. Wilkins, Associate, Philosophy, University of Sydney
http://evolvingthoughts.net
But al be that he was a philosophre,
Yet hadde he but litel gold in cofre
Ron O
May 26, 2013, 8:59:30 AM5/26/13
to
On May 26, 12:03�am, j...@wilkins.id.au (John S. Wilkins) wrote:
> Bob Casanova <nos...@buzz.off> wrote:
> > On Sat, 25 May 2013 10:17:44 -0700 (PDT), the following
> > appeared in talk.origins, posted by Ron O
> > <rokim...@cox.net>:
> Bob Casanova <nos...@buzz.off> wrote:
> > On Sat, 25 May 2013 10:17:44 -0700 (PDT), the following
> > appeared in talk.origins, posted by Ron O
>
> > >On May 25, 8:54 am, jillery <69jpi...@gmail.com> wrote:
> > >> On Sat, 25 May 2013 05:47:56 -0700 (PDT), Ron O <rokim...@cox.net>
> > >> wrote:
>
> > >> >On May 24, 10:37 pm, Mark Isaak <eci...@curioustax.onomy.net> wrote:
> > >> >> On 5/24/13 5:21 PM, Paul J Gans wrote:
>
> > >> >> > Burkhard <b.scha...@ed.ac.uk> wrote:
> > >> >> >> On May 24, 11:37?pm, Paul J Gans <gan...@panix.com> wrote:
> > >> >> >>> Bob Casanova <nos...@buzz.off> wrote:
> ...
> > >> >> >>>> When this trait shows up in human canine teeth we make up
> > >> >> >>>> scary stories about the owners. Think of it as stokering
> > >> >> >>>> paranoia...
>
> > >> >> >>> I thought Bram was good for you?
>
> > >> >> >> I need a Bram, a Bram for my Mather......
>
> > >> >> > By the power vested in me by nobody in particular, I declare
> > >> >> > this thread over the top and suitable for moonless nights only.
>
> > >> >> Have you gone batty? �"Over the top" threads are just the sort we like
> > >> >> to sink our teeth into.
>
> > >> >Incissive.
>
> > >> Bloody pun cascade.
>
> > >Just following the vein to the heart of the matter.
>
> > The whole conversation is too artery-fartery for me.
>
> A lot's at stake.
I can't understand the bleeding hearts that think that pun cascades
> > >On May 25, 8:54 am, jillery <69jpi...@gmail.com> wrote:
> > >> On Sat, 25 May 2013 05:47:56 -0700 (PDT), Ron O <rokim...@cox.net>
> > >> wrote:
>
> > >> >On May 24, 10:37 pm, Mark Isaak <eci...@curioustax.onomy.net> wrote:
> > >> >> On 5/24/13 5:21 PM, Paul J Gans wrote:
>
> > >> >> > Burkhard <b.scha...@ed.ac.uk> wrote:
> > >> >> >> On May 24, 11:37?pm, Paul J Gans <gan...@panix.com> wrote:
> > >> >> >>> Bob Casanova <nos...@buzz.off> wrote:
> ...
> > >> >> >>>> When this trait shows up in human canine teeth we make up
> > >> >> >>>> scary stories about the owners. Think of it as stokering
> > >> >> >>>> paranoia...
>
> > >> >> >>> I thought Bram was good for you?
>
> > >> >> >> I need a Bram, a Bram for my Mather......
>
> > >> >> > By the power vested in me by nobody in particular, I declare
> > >> >> > this thread over the top and suitable for moonless nights only.
>
> > >> >> Have you gone batty? �"Over the top" threads are just the sort we like
> > >> >> to sink our teeth into.
>
> > >> >Incissive.
>
> > >> Bloody pun cascade.
>
> > >Just following the vein to the heart of the matter.
>
> > The whole conversation is too artery-fartery for me.
>
> A lot's at stake.
suck. They have to retract their fangs and go with the flow.
> --
> John S. Wilkins, Associate, Philosophy, University of Sydneyhttp://evolvingthoughts.net
Burkhard
May 26, 2013, 9:17:45 AM5/26/13
to
On May 26, 6:03�am, j...@wilkins.id.au (John S. Wilkins) wrote:
> Bob Casanova <nos...@buzz.off> wrote:
> > On Sat, 25 May 2013 10:17:44 -0700 (PDT), the following
> > appeared in talk.origins, posted by Ron O
> > <rokim...@cox.net>:
> Bob Casanova <nos...@buzz.off> wrote:
> > On Sat, 25 May 2013 10:17:44 -0700 (PDT), the following
> > appeared in talk.origins, posted by Ron O
>
> > >On May 25, 8:54 am, jillery <69jpi...@gmail.com> wrote:
> > >> On Sat, 25 May 2013 05:47:56 -0700 (PDT), Ron O <rokim...@cox.net>
> > >> wrote:
>
> > >> >On May 24, 10:37 pm, Mark Isaak <eci...@curioustax.onomy.net> wrote:
> > >> >> On 5/24/13 5:21 PM, Paul J Gans wrote:
>
> > >> >> > Burkhard <b.scha...@ed.ac.uk> wrote:
> > >> >> >> On May 24, 11:37?pm, Paul J Gans <gan...@panix.com> wrote:
> > >> >> >>> Bob Casanova <nos...@buzz.off> wrote:
> ...
> > >> >> >>>> When this trait shows up in human canine teeth we make up
> > >> >> >>>> scary stories about the owners. Think of it as stokering
> > >> >> >>>> paranoia...
>
> > >> >> >>> I thought Bram was good for you?
>
> > >> >> >> I need a Bram, a Bram for my Mather......
>
> > >> >> > By the power vested in me by nobody in particular, I declare
> > >> >> > this thread over the top and suitable for moonless nights only.
>
> > >> >> Have you gone batty? �"Over the top" threads are just the sort we like
> > >> >> to sink our teeth into.
>
> > >> >Incissive.
>
> > >> Bloody pun cascade.
>
> > >Just following the vein to the heart of the matter.
>
> > The whole conversation is too artery-fartery for me.
>
> A lot's at stake.
> --
And yet,it will be all in vein, the necks cascade is already looming.
> > >On May 25, 8:54 am, jillery <69jpi...@gmail.com> wrote:
> > >> On Sat, 25 May 2013 05:47:56 -0700 (PDT), Ron O <rokim...@cox.net>
> > >> wrote:
>
> > >> >On May 24, 10:37 pm, Mark Isaak <eci...@curioustax.onomy.net> wrote:
> > >> >> On 5/24/13 5:21 PM, Paul J Gans wrote:
>
> > >> >> > Burkhard <b.scha...@ed.ac.uk> wrote:
> > >> >> >> On May 24, 11:37?pm, Paul J Gans <gan...@panix.com> wrote:
> > >> >> >>> Bob Casanova <nos...@buzz.off> wrote:
> ...
> > >> >> >>>> When this trait shows up in human canine teeth we make up
> > >> >> >>>> scary stories about the owners. Think of it as stokering
> > >> >> >>>> paranoia...
>
> > >> >> >>> I thought Bram was good for you?
>
> > >> >> >> I need a Bram, a Bram for my Mather......
>
> > >> >> > By the power vested in me by nobody in particular, I declare
> > >> >> > this thread over the top and suitable for moonless nights only.
>
> > >> >> Have you gone batty? �"Over the top" threads are just the sort we like
> > >> >> to sink our teeth into.
>
> > >> >Incissive.
>
> > >> Bloody pun cascade.
>
> > >Just following the vein to the heart of the matter.
>
> > The whole conversation is too artery-fartery for me.
>
> A lot's at stake.
> --
John S. Wilkins
May 26, 2013, 9:37:13 AM5/26/13
to
threads continue eternally, never dying.
Ron O
May 26, 2013, 9:46:03 AM5/26/13
to
shines on this newsgroup, and it is always a full moon for the
lunatics.
> --
> John S. Wilkins, Associate, Philosophy, University of Sydneyhttp://evolvingthoughts.net
Mark Isaak
May 26, 2013, 10:44:45 AM5/26/13
to
>>> And yet,it will be all in vein, the necks cascade is already looming.
>>
>> Fangs for that. I knew someone wood come up with a response. These
>> threads continue eternally, never dying.
>
> That just tells you that not a lot is at stake, the light of day never
> shines on this newsgroup, and it is always a full moon for the
> lunatics.
You've got a nose fer rot, you.
>>
>> Fangs for that. I knew someone wood come up with a response. These
>> threads continue eternally, never dying.
>
> That just tells you that not a lot is at stake, the light of day never
> shines on this newsgroup, and it is always a full moon for the
> lunatics.
jillery
May 26, 2013, 11:09:54 AM5/26/13
to
On Sun, 26 May 2013 06:46:03 -0700 (PDT), Ron O <roki...@cox.net>
wrote:
wrote:
>> > And yet,it will be all in vein, the necks cascade is already looming.
>>
>> Fangs for that. I knew someone wood come up with a response. These
>> threads continue eternally, never dying.
>
>That just tells you that not a lot is at stake, the light of day never
>shines on this newsgroup, and it is always a full moon for the
>lunatics.
We need to transfuse some fresh blood.
>>
>> Fangs for that. I knew someone wood come up with a response. These
>> threads continue eternally, never dying.
>
>That just tells you that not a lot is at stake, the light of day never
>shines on this newsgroup, and it is always a full moon for the
>lunatics.
Walter Bushell
May 26, 2013, 12:52:05 PM5/26/13
to
In article <1l3i42s.4k29ptsyciqlN%jo...@wilkins.id.au>,
Zombie threads can't die, obviously.
--
Gambling with Other People's Money is the meth of the fiscal industry.
me -- in the spirit of Karl and Groucho Marx
--
Gambling with Other People's Money is the meth of the fiscal industry.
me -- in the spirit of Karl and Groucho Marx
Ron O
May 26, 2013, 1:06:36 PM5/26/13
to
On May 26, 11:52 am, Walter Bushell <pr...@panix.com> wrote:
> In article <1l3i42s.4k29ptsyciqlN%j...@wilkins.id.au>,
Dawn of the Thread and all the other sequels
> In article <1l3i42s.4k29ptsyciqlN%j...@wilkins.id.au>,
Bob Casanova
May 26, 2013, 1:37:03 PM5/26/13
to
On Sun, 26 May 2013 06:46:03 -0700 (PDT), the following
They should be forced to endure a whomp year.
appeared in talk.origins, posted by Ron O
<roki...@cox.net>:
Steven L.
May 26, 2013, 2:14:07 PM5/26/13
to
On 5/22/2013 8:07 PM, Metspitzer wrote:
> http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=rssnws1
>
I cannot abide those friggin' ads.
The ads always play at the highest resolution. and since I only have
DSL, it takes forever even to get to the point at which I can hit the
Skip button.
--
Steven L.
> http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=rssnws1
>
I cannot abide those friggin' ads.
The ads always play at the highest resolution. and since I only have
DSL, it takes forever even to get to the point at which I can hit the
Skip button.
--
Steven L.
jillery
May 26, 2013, 3:51:55 PM5/26/13
to
option, and last longer than the actual video.
drose...@yahoo.com
Jun 13, 2013, 1:13:11 PM6/13/13
to
On Wednesday, May 22, 2013 8:07:32 PM UTC-4, Metspitzer wrote:
> http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=rssnws1
This was explained to me by a docent at an aquarium. It sounds right but I have no references to back it up.
All vertebrates with hard-bone jaws can grow only a limited number of teeth. The sockets of a tooth generally fit the roots of the teeth. Therefore, every time a tooth comes out, there is a chance to break the jaw. The teeth are programmed to come out only when the socket is larger than the jaw, which happens during the phase of growth. When the vertebrate stops growing, then the teeth can't be replaced.
Sharks have teeth that can be renewed constantly. However, they also have jaws made of cartilage. The jaws of Jaws are very elastic. So even after the shark has stopped growing, the teeth can come out without breaking the sharks jaw.
> http://news.discovery.com/videos/why-cant-we-regrow-teeth.htm#mkcpgn=rssnws1
This was explained to me by a docent at an aquarium. It sounds right but I have no references to back it up.
All vertebrates with hard-bone jaws can grow only a limited number of teeth. The sockets of a tooth generally fit the roots of the teeth. Therefore, every time a tooth comes out, there is a chance to break the jaw. The teeth are programmed to come out only when the socket is larger than the jaw, which happens during the phase of growth. When the vertebrate stops growing, then the teeth can't be replaced.
Sharks have teeth that can be renewed constantly. However, they also have jaws made of cartilage. The jaws of Jaws are very elastic. So even after the shark has stopped growing, the teeth can come out without breaking the sharks jaw.
jillery
Jun 13, 2013, 2:18:43 PM6/13/13
to
teleost fish replace their teeth throughout their life, as do
crocodilians, and all of these have hard-bone jaws. Also, elephants
are an exception for most mammals, in that they replace their molars
six times instead of the standard twice.
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