Comets started agricultural civilization

US experts have linked a collision event with the celestial celestial body in Canada about 12,900 years ago with global climate change, wiping out large mammals on the Earth's surface.

Scientists at Dartmouth University said the destruction could force people to start gathering and cultivating instead of merely hunting.

The collision with comets, or an asteroid, took place at the beginning of the Big Freeze, which marked a sudden global change in a colder, drier climate, with an impact spread to both humans and animals.

Mammoths were also wiped out during this event - (Photo: commons.wikimedia.org)

In North America, large mammals such as mammoths, camels, large land lazy, tigers and tigers all disappeared, and those who hunted them, Clovis, reared their spears and switched to hunting diets - Gathering, based on tree roots, fruits and smaller scale hunting.

'The Great Cold War strongly influenced human history' , according to Register, quoted by Dartmouth University researcher Mukul Sharma.

The assumption of a collision with the celestial body is contrary to the prevailing hypothesis that the cooling phase of the Great Cold is due to changing currents in the oceans.

Sharma and colleagues argue that the results of the analysis of spherals and condensed ice droplets are thrown out of a collision of comets or meteorites, at the site of the Great Cold Boundary of Pennsylvania and New Jersey (USA) has similarities with stones in southern Quebec (Canada), where experts believe it is the point of the collision.

'For the first time we narrowed down the area where a collision took place,' said Sharma expert, although he admitted he had yet to find a collision hole.