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H. sapiens & H. erectus together in Java
James Howard (phis@sprynet.com)
Wed, 18 Dec 1996 14:31:40 GMT
H. sapiens & H. eretus together on Java
My theory of human evolution suggests that whenever a feed and breed
situation exists, testosterone will rise. Whenever this occurred,
especially in "position-locked" places, I suggest the rise in
testosterone eventually produced large robust hominids. These high
testosterone, robust hominids are more vulnerable to a number of
phenomena that eventually cause their demise. They are replaced by
more gracile hominids that produce a higher DHEA to testosterone
ratio. These gracile hominids are less vulnerable to the negative
influences of the phenomena that participated in the elimination of
the robust types. If you did not follow the foregoing, I intended to
say that robust hominids will increase in numbers due to increases in
testosterone in hominid groups. These hominids die out and are
replaced by lower testosterone groups in position-locked
circumstances, like Java. (Where there is room to flee, lower
testosterone hominids flee.) I have covered all of these ideas, along
with examples, in my other posts here; if this interests you, please
find them.
In the case of the "H. erectus" living so late on Java, that is, they
are considered contemporaries of H. sapiens, I suggest my mechanism
explains this. Hominids migrated to Java. The increase in
testosterone occurred. The high testosterone types became vulnerable
to reduced reproduction, and they were replaced by lower testosterone
types. If anyone read my explanation of the Flynn Effect, they would
know that the increase in testosterone should increase the brain size
slightly over time. The H. erectus specimens found on Java exhibited
an average increase in cranial capacity between that of older H.
erectus and H. sapiens. I suggest my theory of human evolution
accounts for the hominid finds on Java.
James Howard
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