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Free Reading (84th)
The face shape, the size of the jaw and teeth, and the number of people communicating are seen from their food-processing skills. In ancient humans, because they have not found the means to cut their food into small pieces then they have to chew for a long time. This causes their teeth and jaws to be large, their faces change, and they will interact a little. For example in ancient times sipanse chew food for half a day. As humans evolved to find a tool that could help them chew food, it would make it easier for digestion to process food. Seen once the difference body of people who chew a little and more examples, early humans and humans at this time.
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