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Online Learning, Alcohol Cravings, Manipulative Dogs

Curiosity Weekly

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Do Dogs Have Fast Twitch Facial Fibers?

Dogs are descended from wolves. Because of domestication, the dogs of today have a higher number of fast facial muscles than wolves and have facial features that are closer to humans. It's believed that humans selected dogs with fast twitch facial fibers in their mimetic muscles so they could more accurately communicate with facial expressions.

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