THIS DAY IN SCIENCE: Bali Tiger Is Extinct in 1937

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Why Do Men Have Nipples?

Why Do Men Have Nipples?

If men can’t nurse, then why do they have nipples? The answer has less to do with evolution and more to do with your personal development as a teeny tiny embryo. Short version: We’re all girls — at least at first. Hank explains! Like SciShow? Want to...
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