Found traces of the ancient Americans

The age of the finds is more than a hundred thousand years.

Scientists from the U.S. and Australia have discovered the fossilized remains of a mastodon, the bones of which revealed traces their treatment. The age of the finds is more than a hundred thousand years. This shows that ancient people arrived in North America earlier than previously thought. Article researchers published in the journal Nature.

Fossils of extinct mammal has been found in rocks belonging to the late Pleistocene, in the County of San Diego in southern California. Scientists discovered the bone fragments crack, which is characteristic for the impact a solid object. There was found a stone anvil with signs of wear that could be caused by natural processes.

The bone age 130 thousand years is determined using the uranium-thorium Dating. This method consists in determining the fraction of decayed radioactive elements that turn into a lead.

The researchers came to the conclusion that people have sufficient skill and knowledge to use large stones as hammers and tools to extract bone marrow.

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