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http://www.newscientist.com/article/dn16155-did-neanderthal-cells-cook-as-the-climate-warmed.html

Another hypothesis as to why Neanderthals died out has been proposed:

Mutations in mitochondria which helped Neanderthals cope better with the cold in Ice Age Europe may have been detrimental once the climate started to change.

Read this short article to see why this has been suggested and how it fits in with existing hypotheses.

 

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