Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate Building a perfect igloo takes cool science! Don’t miss the next video! SUBSCRIBE! ►► http://bit.ly/iotbs_sub ↓ More info and sources below ↓ If you ever find yourself stranded in the snowy Arctic (or bored in Minecraft), you’re gonna need to know how to build an igloo. But how can building a house made of ice keep you warm? The science behind building an igloo is the same reason that otters and reindeer don't freeze to death! LEARN MORE: There really ARE 50 Eskimo words for snow: http://wapo.st/2iwThf3 PBS Idea Channel - An Infinite Number of Words for Snow https://www.youtube.com/watch?v=CX6i2M4AoZw Why there’s no such thing as cold: https://www.youtube.com/watch?v=Akd7MMRKDwc How early humans settled the Arctic: https://uaf.edu/files/olli/Denbigh-Slides_lowres.pdf How to build a scientifically perfect igloo: http://www.popsci.com/how-to-build-an-igloo It’s Okay To Be Smart is hosted by Joe Hanson, Ph.D. Facebook: http://www.facebook.com/itsokaytobesmart Twitter: @okaytobesmart @DrJoeHanson Tumblr: http://www.itsokaytobesmart.com/ Instagram: @DrJoeHanson Produced by PBS Digital Studios Music via APM Stock images from Shutterstock http://www.shutterstock.com/