Prehistoric humans rarely mated with their cousins

Today, more than 10 percent of all global marriages occur among first or second cousins. While cousin-marriages are common practice in some societies, unions between close relatives are discouraged in others. In a new study, ...

Oldest Scandinavian human DNA found in ancient chewing gum

The first humans who settled in Scandinavia more than 10,000 years ago left their DNA behind in ancient chewing gum, masticated lumps made from birch bark pitch. This is shown in a new study conducted at Stockholm University ...

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