The human form has changed because of the level of testosterone Bashny.Net

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Scientists say that falling testosterone levels, that took place 50 thousand years ago, has greatly changed human form.

Apart from external appearances, our ancestors began to actively manifest the ability of the arts and science. Although traces of modern man in the fossil record there are about 200000 years, that is 50 thousand years ago, the culture and crafts have become widely spread. A study of more than 1,400 skulls of modern and ancient people conducted at the University of Utah, indicates that human society began to change due to a decrease in testosterone level. Anthropologist and head of the research team Steven Churchill is confident that changes to the shape of the skull closely related to the level of the testosterone.

Biologist Robert Cieri compared the brow ridges, facial shape and interior volume of 13 human skulls older than 80,000 years, 41 skull, age 10 000-38 000 years ago and samples 1367 skulls of the 20th century from 30 different ethnic groups. The downward trend of the brow, as a rule, reflects the decrease in the action of testosterone.

Numerous evidence suggests that 50,000 years ago, ancient people began to actively produce tools from bone and horn to apply heat treatment, throwing weapons, fishing birds and fish.

Source: nauka24news.ru/