Of all animal species, human hands are the most efficient. They developed in humans during evolution.

Apparently, distant ancestors did something that other animals did not.. Now scientists have voiced a new theory of the development of the human hand. She's somewhat unusual..

Compared to primates, the human hand has clear differences. The thumb is longer and more muscular. Others, on the other hand, are shorter.. The wrist is much more flexible than monkeys, and the palms are more stable.. Joints have a large surface.

Scientists believe that the use of tools and weapons, including throwing weapons, contributed to this development of the hand.. With the help of tools, ancient people cracked nuts, cut meat, crushed bones, extracting bone marrow, and much more.. Each of these actions influenced the evolution of the hand in its own way..

To identify this, scientists installed sensors on the hands of 39 people, with the help of which it was taken into account which finger phalanges work during a particular action..

Least of all effort was required when cracking nuts. Scientists believe monkeys also mastered this, but did not go further. Therefore, the evolution of the hand of primates stopped, while humans continued.

US anthropologists are sure that it is in impact actions that the basis of progress in the development of the human hand. However, it improved under the influence of other factors..

aspect. net.