New international research: Humans lived in North America 30,000 years ago

the earliest days of human habiting in the Americas has been controversial, with the conventional view that humans first arrived in the Americas about 13,000 years ago. However, the latest international archaeological study brings this point forward, suggesting that humans lived in North America as early as 30,000 years ago.
recently published two archaeological research papers in nature, an internationally renowned academic journal, suggesting that The Americas has a longer human history than previously thought by shed light on evidence of its early arrival in North America.
the paper, the arrival of humans in the Americas marks one of the major human diffusions on Earth. The conventional view is that humans first arrived in the Americas about 13,000 years ago and were associated with the formation of the Clovis culture, known for its unique stone tools. However, the patterns and times of human migration to the Americas have been mixed.
the first study, Ciprian Ardelean and colleagues at the Autonomous University of Zacatecas, Mexico, described excavations in the Zacatecas cave in central Mexico, including stone tools, plant fossils and environmental DNA. Using a combination of annual evidence, their study showed that the high-altitude cave was occupied by humans between 30,000 and 13,000 years ago.
In the second study, Lorena Becerra-Valdivia of the University of New South Wales in Australia and Thomas Higham of the University of Oxford in the United Kingdom used radiocarbon and light release dating from 42 archaeological sites in North America and the Bering Land Bridge, a region that historically connected Russia and the Americas, to determine patterns of human migration. A statistical model they built revealed strong signals from the former Clovis population, dating back at least to the last ice age (about 26,000-19,000 years ago) and the period that followed.
two new studies show that North America began to have a small number of human habitations much earlier than previously thought -- probably before the last ice age. Some experts have expressed the view that the results of the study do not fully coincide with the previous assumption that humans entered North America for the first time from Asia via the Bering Land Bridge and then southwards, forming the Clovis culture. The new anthopaedis results bring this time forward to the pre-Clovis period, suggesting that humans may have entered the Americas for the first time along the Pacific coast. (Complete)