THIS DAY IN SCIENCE: Smallpox Vaccination - Introduced (Jenner) in 1799

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Origins Of The Anus – Earth Unplugged

We all have an anus, but there was a time in our evolutionary past when our distant ancestors did not. In this video, Maddie Moate talks you through the origins and why we have what we have. Subscribe to Earth Unplugged for more amazing animal videos

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