Is Contagious Yawning Essential to Survival?
Why is yawning contagious? It might be your body trying to keep on the lookout for snakes. Hosted by: Rose Bear Don't Walk SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at http://www.scishowtangents.org
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https://www.sciencedirect.com/science/article/abs/pii/S0031938419302665 https://www.nytimes.com/2019/02/22/well/live/why-do-we-yawn.html https://apps.who.int/bloodproducts/snakeantivenoms/database/ IMAGE SOURCES