Man arrived in South America 22,000 years ago

Man arrived in South America 22,000 years ago

The stone tools discovered in a Brazilian rock shelter they can be from ago 22,000 years. Its discovery has reignited the debate as to whether the ancients reached America long before the famous Clovis hunters scattered across North America 13,000 years ago.

Other places in South America have been proposed as human settlements long before the Clovis culture of North America. The most controversial is the Piedra Furada rock shelter in Brazil. There, archaeologists unearthed burnt wood and sharp arrow-shaped stones from more than 50,000 years ago.

The excavators of Pedra furada they regard the finds as evidence of ancient bonfires and stone tools. However, critics and researchers of the Clovis think that the Brazilian discoveries could have been the result of natural fires and rock falls.

The new discovery The stone refuge of Toca da Tira Peia has been produced, which is located in the same national park as Pedra Furada. This finding has also created skepticism. According to archaeologist Gary Haynes of the University of Nevada, the location of the site (situated at the base of a steep cliff) raises the possibility that the sharp stones may have fallen from the rocks and are not actually a human product. Another possibility is that capuchin monkeys or other monkeys made the tools, says archaeologist Stuart Fiedel.

The age of the Toca da Tira Peia objects has also been the subject of debate. According to Haynes, various environmental conditions, including fluctuations in soil moisture, may have distorted estimates of its age.

But archaeologist Tom Dillehay of Vanderbilt University (Nashville) has witnessed some of the objects of Toca da Tira Peia and assures that they are made by man, since in addition, similar tools have been discovered in the Chilean and Peruvian sites.

Lahaye and Boëda's team excavated at Toca da Tira Peia from 2008 to 2011. They found 113 stone artifacts among which were tools and rubble in five layers of soil. Using a technique that measures natural radiation damage in excavated quartz grains, scientists estimated that the last soil exposure to sunlight was about 4,000 years ago in the top layer and 22,000 years ago in the third layer.

Lahaye indicated that humans who disturbed the stones in the lower soil layer must have been there 22,000 years ago. The researchers plan to calculate when the objects were buried.

Almost graduated in Advertising and Public Relations. I started to like history in 2nd year of high school thanks to a very good teacher who made us see that we have to know our past to know where the future takes us. Since then I have not had the opportunity to investigate more in everything that our history offers us, but now I can take up that concern and share it with you.

Video: Humans First Appearance in the Americas: Challenging Clovis. The New York Times