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Neanderthals most likely lived in small groups with around 3,000 adults.

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Neanderthal DNA in humans interact with the environment. These include skin, hair, and the immune system. The interbreeding between Homo Sapiens and Neanderthals helped them adapt to new environments faster.

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There is evidence of interbreeding between Homo sapiens and Neanderthals. This may have given us access to genes that were already adapted to environments that haven't even been encountered yet.

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After studying a Neanderthal from 52,000 years ago, researchers believe that their DNA influences our risk to heart attacks, developing eating disorders, and schizophrenia.

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The Neanderthal that was analyzed was from the Siberian province of Altai about 122,000 years ago. After analyzing the Neanderthal, researchers estimated that non-Africans today have between 1.5% and 2.1% of Neanderthal DNA.

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Modern humans may have met up with Neanderthals after they moved from Africa tens of thousands of years ago, and that is how scientists explain that people from Africa have little to no Neanderthal DNA.

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Neanderthals lived mainly in Europe and Western Asia for hundreds of thousands of years, but disappeared 40,00 years ago. People of western Eurasian heritage have between 1.8% and 2.4% Neanderthal DNA.

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People in East Asia have the highest percentage of Neanderthal DNA, which can range between 2.3% and 2.6%.