Why Is Yawning Contagious? Why do we yawn? If you thought that it is because we need more oxygen, you were wrong. Facebook Prev Article Next Article Discover Checkout these cool gadgets... Related Posts Crazy Elon Musk’s Plan What Will Happen After the Technological Singularity? How fast is the speed of thought? What Can We Learn By Drilling Into The Earth’s Mantle? The Difference of Speeding 5km/h More Archimedes and a Boat Lift: the Falkirk Wheel