Jean-Jacques Rousseau was a philosopher in the 18th century. He wrote novels and had many different theories on humans, some of which are still accepted today.
The first humans to settle in the Americas crossed the Bering Strait between Alaska and Siberia. At the time it was a plain and you could walk across.
It's commonly held that the first humans came to the Americas via a "land bridge" between Russia and Alaska during the Ice Age when it's thought to have been possible to walk across what's now the Bering Strait. So those humans would have come from Asia.
No, they only became "native Americans" after they migrated into the Americas - it follows that there were human beings before those migrations took place. America may have been first populated only around 20,000 years ago (the date is still being investigated); the first modern humans in Asia lived perhaps 60,000 years ago. The earliest modern humans (Homo sapiens) evolved in East Africa around 200,000 years ago.
instincts
The two leading theories are the Coastal Migration Theory, which suggests that the first humans arrived in the Americas by traveling along the Pacific Coast in boats, and the Clovis First Theory, which proposes that humans first arrived in the Americas via a land bridge from Asia during the last Ice Age.
" Unintended consequences? " Scientific theories are explanations of natural phenomenon. Only humans can make " consequences ", theories explain things.
Scientists do not know for certain why mammoths died out. Theories include climate change leading to habitat loss or overhunting from humans.
The leading theory is that humans first came to the Americas by crossing the Bering land bridge from Asia to North America during the last Ice Age. This migration is believed to have occurred around 15,000-20,000 years ago as the ice sheets melted and opened up a corridor for early humans to travel.
Some other theories humans have devised are:The Big Bang theory of cosmological expansionThe theories of general and special relativityThe germ theory of diseaseAtomic theory and quantum mechanics
While there are many theories, the most commonly accepted is that they walked over across the land bridge that used to exist between present-day Russia and Alaska.
The theory or theories that can best explain the relationships between the key variables in your study.
=) gd luck
Humans
Land bridges
It is theorized that the first humans arrived on the continent during the last ice age, about 15,000 years ago. They would have crossed into Alaska by way of the Bering Land Bridge.
The scientific methods employed in the construction of origin theories of Canada's First Nations peoples are diverse and the results are inconclusive. Skeletal evidence of what is believed to be the first modern human, or homo sapien, was found in Africa and is dated to 40,000 years ago. Based upon this information, scientists place the origin of the human species outside of the Americas. This is contrary to the belief of First Nations peoples. According to their oral tradition, they originated in North America and did not migrate from somewhere else. Scientists from several different disciplines support theories of migration from Asia to the Americas, but they disagree over when, how or why the first humans came to the Americas.