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Coming to America
The traditional hypothesis proposes that humans arrived on the American continent by crossing an ice bridge or emerged lands in the Bering Strait, between the present United States and Russia.
According to this hypothesis, some scientists claim that the first groups arrived about 20,000 years ago, during the last ice age, when the planet's temperature was extremely low and the glaciers advanced from the poles to the equator.
These first occupants of America, who would have come from present-day Mongolia and Siberia, Asia, would be hunters and would be stalking their prey when they crossed over to North America. It seems that at that time the sea level was approximately 150 meters lower than today, thus forming a solid strip of ice. This ice sheet would have broken down when the planet's temperature rose, giving rise to the current Bering Strait.
The migration of humans across the Bering Strait cannot be ruled out, but other paths are likely to have existed. It is also possible that men and women arrived on the American continent long before that date.
The brazilian man
It is still unclear when the first human groups began to populate the Brazilian territory.
For many years, these groups have been growing and advancing in all directions of the continent, even occupying the territory that today is Brazil. Since they were nomads, they moved from place to place, feeding on animals, fish, fruits and roots.
They traveled southward, following herds of animals and hunting bison, mammoths, beavers, and giant sloths. Scientists have found fossils of these animals and arrowheads that indicate the paths our ancestors walked.
Over time, some groups were settling in different places. They began to tame animals and cultivate the land, forming small villages.
Many scientists claim that human groups have been here for 12,000 years. Others speak in 25,000 years. The fact is that recent work shows that 10,000 years ago Brazil was not a desert of people. Different peoples had already spread to regions such as the Amazon, the Northeast, the Pantanal and the Cerrado.
Traces of humanity
Fossils are the main sources of information used by people who study the origin of humanity.
The fossil is not part of the living being. Some ores over time replace organic material, preserving the original form of the living being. So the fossil is called petrified or hardened forms of living beings, at least 10,000 years old.