Scientists find stable sea levels during last interglacial

Visualize the following: The Earth's climate swings between cold glacial and warm interglacial periods; the last glacial interval was about 20,000 years ago; sea level was about 126 meters (413 feet) below modern sea level ...

Research Team Finds Evidence Cacao Ritually Used in Chaco Canyon

(PhysOrg.com) -- Inhabitants of Chaco Canyon apparently drank chocolate from cylinders like these about a thousand years ago. That’s the finding in a paper published this week by PNAS, a publication of the National Academy ...

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