All of this allows us to understand why protein did not develop the hand and fingers. Climbing and running has always been more important to them than grasping. These animals feed on nuts, pine cones, seeds - fixed objects, which can rip and slowly gnaw at your leisure. Primates, on the contrary, were able to adapt to the tree of life and at the same time retain their predatory inclinations.
Development of primate hands accompanied by other adaptations. In order to successfully jump and grab prey, it is necessary to assess the distance well. Without this animal is, at best, will remain hungry, and at worst - will fall not on the branch and fall to the ground. To accurately estimate the distance in primates develop binocular vision in which both eyes are centered on the subject, providing depth perception. In this case, the eyes must reside at the front side of the skull rather than a side view, like proteins. The device of binocular vision occurs in ancestral primates. Their skull becomes a rounded shape that corresponds to the new position of the eyes. In this regard, increased cranial capacity and creates the potential for the development of a larger brain. At the same time, the jaws become shorter. With the formation of the brush teeth cease to be the main body of the hunting and gathering of food and becomes smaller. Modern lower and apes, as well as humans, have sixteen teeth in each jaw. Their ancestors that number reached twenty-two.
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