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Other species stained teeth to be intimidating to the enemy. What is really good is that we humans showing teeth? For 5-7000000 years ago removed the human evolutionary line from the chimpanzee, while there occurred an important physiological change: Our ancestors lost the big, powerful canines to know from the other great apes and more expensive as well. Chewing our appliance changed to accommodate an expansion of the skull, while we lost corner best electric toothbrush teeth fearsome appearance. That our ancestors in fact did was to replace weapons against best electric toothbrush a slightly larger brain, and the ability to walk upright on two legs. The before so scary canines was now just an empty threat that had to be replaced by other methods, and our ancestors evolved threatening poses with a rock or a stick. The monkeys showed yet the teeth to chase the enemy to flight, but because our forefathers small canines were unfit to scare anyone, we held up to bare his teeth to appear threatening. best electric toothbrush However ancestors best electric toothbrush had yet the ability to show teeth, although there was no longer need for it. Evolution does, however, never break, and let not designed to stand idle. Therefore, people found a new use for the ability best electric toothbrush to show teeth. We developed our complex facial expressions and in the same context tooth smile. Facial movements are adapted to our intelligence and to the need to communicate and express a variety of emotions, and in this context the smile a very important role.
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