How Things Work | Submarines, 3D Printers, Popcorn & MORE | Nat Geo Kids Compilation | @NatGeoKids

By Nat Geo Kids

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Kamri Noel and four of National Geographic’s experts find out how things work. 00:00 How Submarines Work Kamri Noel asks marine biologist David Gruber to explain how submarines dive and navigate. 02:19 How Gecko Feet Work Kamri Noel and National Geographic’s David Gruber discover what makes gecko feet stick. 04:31 How Popcorn Works Popcorn is a delicious snack, but Kamri Noel wants to know what makes it pop. 07:12 How Lava Lamps Work Kamri Noel is on a mission to find out what's really floating inside lava lamps. 10:09 How Fitness Trackers Work Kamri Noel wants to know: How do fitness trackers tell how many steps you’ve taken? 12:49 How 3-D Printers Print Kamri Noel is on a quest to understand her 3-D printer with the help of a Nat Geo expert. 15:20 How Digital Cameras Work Kamri Noel and photo engineer Tom O’Brien explore the science of digital cameras. 17:13 How Trebuchets Work Kamri Noel asks National Geographic’s Tom O’Brien about the physics of medieval trebuchets. ➡ Subs

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