Người cũng bị ảnh hưởng thế

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The average brain size of cattle (gia súc) has shrunk (teo, co) as we have domesticated (thuần hóa) them, and their brains seem to get smaller the more time they spend around humans.

In general, domesticated animals tend to have smaller brains than their wild counterparts. This phenomenon hadn’t previously been identified in cattle, as their wild ancestor (tổ tiên) has been extinct for several hundred years.

To estimate the brain size of wild cattle, Ana Balcarcel and her colleagues at the University of Zurich in Switzerland measured 13 skulls from the extinct aurochs (Bos primigenius), the probable ancestor of modern cattle. They then compared these to known measurements of 317 skulls from 71 breeds of domestic cattle (Bos taurus).

Based on the size differences in the skulls, the team estimates that the brains of domestic cattle are about 26 per cent smaller on average than those of wild cattle.

Bài trước: Vậy là có thể tìm tàu lượn cao tốc bị mất rồi