So I was watching this [documentary](https://youtu.be/8p8tFcIQ8K4?si=N48hW93UoRJfKk5w) on NEANDERTHALS and needed some explanation on how the scientists figured out the following.
1. Groups of Neanderthals would meet regularly at certain places once a year and exchange information/people. There are evidences in the sidron cave in Spain that they would exchange women too.
2. If Neanderthals inbred with Homo Sapiens, then why are we saying Neanderthals got extinct slowly. Should’t some of us have Neanderthals genes as well?
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For the first point, you can trace movements and interactions by regional artifacts. Tribes from coastal areas would have a lot of shells and fish bones and whatnot in their archaeological sites. Tribes from inland would have more large fauna bones and wood.
In sites with both, you can reason that someone must have traveled to bring these distant artifacts together.
As for the Neanderthal DNA – most people of non-African descent do have some Neanderthal heritage.
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