Video · How Do Noise-Canceling Headphones Work? TwitterShare on Facebook69 414 100 views SciShow - June 21, 2016 Science SciShow More Videos Your Gorgeous Hair Evolved From Frog Toes Science · 2 days ago Hobbits Were Real. Why Were They So Small? Science · 3 days ago Should the Earth Even Have Water? Science · 4 days ago Space, Goats, and Climate Change Science · 5 days ago We Can’t Find the Most Important Fossils Ever Science · 6 days ago The Shocking Violence Of The Chimpanzee War Science · 1 week ago A Quarter Of All Your Bones Are In Your Feet Science · 1 week ago We Could Put The World’s Rarest Tree In Your Back Yard Science · 2 weeks ago