The Reason We Yawn Might Might Be to Cool Down Our Brains What makes yawning so contagious? Why do we yawn? Could it be to cool our hot brains? Facebook Prev Article Next Article Discover Checkout these cool gadgets... Related Posts How This Invention Could Save Natural Disaster Victims New study shows that the polar vortex is shifting Make an Emergency Key in 5 Easy Steps Pluto’s Mysterious Atmosphere Could Help Us Fix Global Warming The Pacific Ocean is VASTLY Bigger Than You Think NASA has no protocol for dealing with intelligent aliens