On Tue, 23 May 2023 23:45:13 -0700 (PDT), Ned <
ned...@ix.netcom.com>
wrote:
>On Tuesday, May 23, 2023 at 9:59:08?PM UTC-7, Me wrote:
>> On Monday, May 22, 2023 at 7:54:25?PM UTC-7, Ned wrote:
Much older are insects (speaking of types rather than individual
species). But the most ancient are spiders which supposedly began as
giant ocean creatures.
Regardless, it is hubris to think that our limited time span gives us
the perspective to know what species are still evolving. They all
are, of course. Being an old species simply means that so far, they
have been able to evolve fast enough, and deal with environmental
change well enough, to survive. Some are on the brink of no longer
being able to do that, like the condor.
Spiders are doing quite well, thank you, while insects are severely
challenged. Pray humans do not entirely rid themselves of such pests,
they being the basis of the food chain of many things, as well as
important to flowering plants.
It does appear that there are certain evolutionary dead ends. Like
being too closely tied to a certain niche. There is a monkey that
eats only the flowers of a certain tropical tree. That monkey really
needs to branch out a little, and it probably would if it were given a
few million years to do it, and if certain monkey populations became
separated from other populations. That is where species can move
apart and become different things in some millions of years.
Another dead end is huge size: elephant, whale. Evolution is greatly
favored if a species can eat most anything, have a short life span and
make lots of babies, like rodents.
So, no, humans do not qualify. They have also fallen victim to a
highly specialized brain. Good thing they are not 12 feet tall. But
they do need to stop gene flow between populations, that would help.
Spread throughout the galaxy? Nice fantasy. Read lots of sci-fi.
That points out another limiting specialization: the tendency to
invent warm fuzzy fantasies when faced with severe existential
challenge. Nature is not amused.
--
Noah Sombrero