THIS DAY IN SCIENCE: Welland Canal Opens in 1824

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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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