Scientists illuminate the ancient history of circumarctic peoples

Two studies led by scientists from the University of Pennsylvania and National Geographic's Genographic Project reveal new information about the migration patterns of the first humans to settle the Americas. The studies identify ...

How red crabs on Christmas Island speak for the tropics

Each year, the land-dwelling Christmas Island red crab takes an arduous and shockingly precise journey from its earthen burrow to the shores of the Indian Ocean where weeks of mating and egg laying await.

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