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My problem with Swoozie’s sleeping in school video

Scientists Tested the '5-Second Rule' for Dropped Food—Here’s What They Found Decades after war hero's death, children ...
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Studying Poop to Save Species

Poop kind of stinks, but the stuff inside of poop can tell us a lot about the natural world. Hosted by: Hank Green Huge thanks go to the following Patreon supporters for helping us keep SciShow free ...