"Although endocasts may be prepared artificially from skulls (using latex),
the occurrence of natural endocasts is a rare envent that depends on highly
favorable geological conditions." Dean Falk, Braindance, (New York: Henry
Holt, 1992) p. 32
Since the opinion of someone who has actually seen the endocasts of the
brains of various fossil specimens should count more than either mine or
Robert van de Water's, here is Dean Falk's opinion,
"Brain size increased with incredible swiftness in the genus Homo. But what
concerns us here is the surface structure of the cerebral cortex. Durring
the summer of 1982, Simon Kasinga nd I cast the braincase of the oldest
skull representing Homo habilis. And guess what. Unlike any of the
australopithecine endocasts, this one (from specimen KNM-ER 1470) appeared to
be humanlike in the revealing convolutions of its left frontal lobe. As
Philip Tobias first suggested, Homo habilis appears to have had a Broca's
speech area in its brain and, as such, was probably capable of some form of
rudimentary humanlike language." Dean Falk, Braindance, (New York: Henry
Holt, 1992) p. 50
glenn