During the course of evolution of human beings, our brain is getting smaller and has shrunk in size similar to that of a tennis ball. Though, this is estimated to have happened over a period of 10-20,000 years. - Study24x7
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11 Apr 2019 11:04 AM study24x7 study24x7

During the course of evolution of human beings, our brain is getting smaller and has shrunk in size similar to that of a tennis ball. Though, this is estimated to have happened over a period of 10-20,000 years.

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