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What is the likely explanation for the rapid increase in body and brain size among homo erectus?
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What is the likely explanation for the rapid increase in body and brain size among homo erectus?

User Aconic
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The rapid increase in body and brain of the homo erectus before was because of the irregularity of the Earths climate. The large brain of the homo erectus gave them a big advantage in learning new things to adapt to the changing environment.
User Bob Baddeley
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