This is amazing.  I mean, it’s truly staggering.
What follows is the application of the exact
same argument I have seen from Young
Earth Creationists many, many times, and
yet it’s supposedly coming from a person
of science:

“For a long time, everyone assumed that
homo erectus evolved from homo habilis
[1.44 million to 2.3 million years], but later
it appeared that homo erectus and homo
habilis lived side by side in Africa for
hundreds of thousands of years, so one
cannot evolve into another and both survive,”
Ferring said. “That raises the question
where homo erectus came from.”

This argument usually takes the form of,
“If we evolved from Apes then how come
there are still apes?”

Evolution isn’t magic.  A species doesn’t
just transform into something else.  The
usual explanation is that evolution doesn’t
work on a species at all, it works on a
population.  In other words, Dinosaurs
didn’t evolve into birds, and even a specific
species of Dinosaurs didn’t evolve into
birds.  What we think happened is that a
specific population of a specific species
evolved into birds.  There could have
been hundreds of other populations of
that species — thousands even — and
there would be no reason for them all to
go extinct just because the environment
& genetics combined in such a way as
to allow one group to evolve into birds.

You can read the rest of it (and find a link
to the original article) here:

http://jtem.tumblr.com/post/32140062383