Re: brain development--one more try

Thu, 9 Feb 1995 20:19:00 PST

James B. writes, as a summary of Calvin:

" The combined effect of these fairly abrupt changes over
a course of several million years led to the jump in encephalization.

Btw, this does not posit a cold/intelligence relationship but rather a harsh
environment/intelligence relation. Making a living in a dry environ seems to
me a more difficult task than in an equitorial zone that is drenched."

The problem with arguments of this nature is that the purported driving
mechanism is not specific to hominids, hence ALL species (or if you
don't like ALL species, substitute African pongids) should have the same push
for encephalization, but don't.

D. Read