The traditional view
The traditional & # 39; Out of Africa & # 39; model suggests that modern humans evolved in Africa and then left in a single wave about 60,000 years ago.
The model often maintains that as soon as modern people left the continent, a short period of crossing with Neanderthals took place.
This explains why individuals of European and Asian descent still have old human DNA today.
There are many theories about what drove the Neanderthals down.
Experts have suggested that early humans can carry tropical diseases from Africa that have eradicated their monkey-like cousins.
Others claim that the falling temperatures due to climate change have destroyed the Neanderthals.
The prevailing theory is that early people killed the Neanderthal through competition for food and living environment.
How the story changes in the light of new research
Recent findings suggest that the & # 39; Out of Africa & # 39; theory does not tell the full story of our ancestors.
Instead, several smaller movements of people from Africa were followed 120,000 years ago by a large migration 60,000 years ago.
The majority of our DNA consists of the latter group, but the earlier migrations, also known as & # 39; dispersals & # 39 ;, are still clear.
This explains recent studies of early human remains found in the far reaches of Asia that go back more than 60,000 years.
For example, remnants of H. sapiens have been found at multiple locations in South and Central China that date back to 70,000 and 120,000 years ago.
Other recent finds show that modern people reached Southeast Asia and Australia before 60,000 years ago.
On the basis of these studies, people could not have come in a single wave from Africa around that time, studies have found.
Instead, human origins suggest that modern people have developed in multiple regions around the world.
The theory claims that groups of pre-human ancestors have found their way out of Africa and have spread to parts of Europe and the Middle East.
From here the species developed into modern people in different places at the same time.
The argument was found by a new analysis of a 260,000-year-old skull in Dali County in the Chinese province of Shaanxi.
The skull suggests that early people migrated to Asia, where they developed modern human traits and then moved back to Africa.
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