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Re: Brain Development
Bonnie Blackwell, x 3332 (bonn@QCVAXA.ACC.QC.EDU)
Tue, 7 Feb 1995 08:24:22 EDT
actually, many large mammal families do show rapid speciation during the
last 5 My. some also show some moderate increases in brain size, but
when compared to body weight, this is negligible. one thing that many
families show during this period is the general increase in body size.
hominids here are no exception, going from 1.25 m average height
(and ~~ 40-50 kg??) to our current 1.75 m. it is not so much the size of
the brain that is of interest here, but the greater development of certain
areas such as the frontal lobes, speech centres, etc.
b
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Bonnie Blackwell, bonn@qcvaxa.acc.qc.edu
Dept of Geology, (718) 997-3332
Queens College, City University of New York, fax: 997-3349
Flushing, NY 11367-1597
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