IT WAS the inexorable hand of climate
that spurred human evolution. This is
the latest finding of Peter
researcher, working with the University
of Columbia's Lamont-Doherty
Observatory, us. No one knows for c
tain what first forced huntoem
remote ape-like ancestors to forsa
the trees they called home, why so
prehistoric species surpassed others or
why primitive human ancestors migrated
ted out of their African homeland.
The new study has come up wise the first detailed evidence to established that weather may be at the root all these momentous changes. An analysis of ocean sediments I revealed that In the last three years, East Africa was rocked times by abrupt cycles of coldw, climate. Each cycle of change with the demise of some primo species and the development of tow who became the forebearers of humanity. 'We 4 now place the ft record of hum development witl the context of very detailed records how African climate changed during the period of evolution," said deMenocal.
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