Tag: south america

The Amazon may contain thousands of undiscovered ancient structures

There are probably more than 10,000 undiscovered pre-Columbian archaeological sites hidden in the Amazon, researchers have concluded after surveying a fraction of the sprawling rainforest.

The study adds to growing evidence suggesting that the region isn’t a pristine tropical forest, but has been significantly altered by Indigenous societies that have inhabited it for more than 12,000 years.

Luiz Eduardo Oliveira e Cruz de Aragão at the National Institute for Space Research in Brazil and his colleagues surveyed 5315 square kilometres of the Amazon using lidar, a technology that uses reflected laser light to create a 3D representation of a landscape.

By beaming pulses of light into the rainforest, usually from planes or drones, lidar records slight variations in topography and has uncovered numerous archaeological sites in recent years.

The team discovered 24 previously unknown earthworks in the areas it surveyed, which are thought to be the remnants of civilisations that lived between 1500 and 500 years ago.

The discoveries include a fortified village in the southern Amazon, a region known to have been densely populated due to the high concentration of earthworks that were connected by ancient roads.

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Second Chinese Spy Balloon Spotted

A second Chinese spy balloon has reportedly been spotted in Latin America.

On Friday evening, the Pentagon confirmed this news. Pentagon Press Secretary Brig. Gen. Patrick Ryder made a statement to CNN.

“We are seeing reports of a balloon transiting Latin America. We now assess it is another Chinese surveillance balloon,” Ryder said.

This comes as a balloon was spotted moving east, 60,000 feet above the central continental U.S., last Friday.

Initially, the Pentagon had said the balloon currently did not pose a “military or political” threat.

According to a senior defense official, the United States has “extremely high confidence” that the object was a Chinese high-altitude balloon that was flying over key locations to gather intelligence. One of the states where the balloon was noticed was Montana, which is home to Malmstrom Air Force Base, one of the country’s three nuclear missile silo fields.

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Ancient DNA analysis sheds light on the early peopling of South America

The Americas were the last continent to be inhabited by humans. An increasing body of archaeological and genomic evidence has hinted to a complex settlement process. This is especially true for South America, where unexpected ancestral signals have raised perplexing scenarios for the early migrations into different regions of the continent.

Many unanswered questions still persist, such as whether the first humans migrated south along the Pacific coast or by some other route. While there is archaeological evidence for a north-to-south migration during the initial peopling of the Americas by ancient Indigenous peoples, where these ancient humans went after they arrived has remained elusive.

Using DNA from two ancient human individuals unearthed in two different archaeological sites in northeast Brazil—Pedra do Tubarão and Alcobaça—and powerful algorithms and genomic analyses, Florida Atlantic University researchers in collaboration with Emory University have unraveled the deep demographic history of South America at the regional level with some unexpected and surprising results.

Not only do researchers provide new genetic evidence supporting existing archaeological data of the north-to-south migration toward South America, they also have discovered migrations in the opposite direction along the Atlantic coast—for the first time. The work provides the most complete genetic evidence to date for complex ancient Central and South American migration routes.

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