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Why human language may be intertwined with fire

Understanding how human language evolved is one of the hardest problems in science to unpick

Video Shows a San Diego Dog Seeming to Greet an Intruder. Why Didn’t He Bark?

MICHAEL LEVENSON

Dog behavior experts offered a variety of explanations for why Nash the golden retriever wagged his tail and carried a toy near a man who broke into his owner’s home.

Two Centuries On, Smithsonian Connects Jefferson’s Hair to Hemings’s Children

JENNIFER SCHUESSLER

A new book describes how cutting-edge genomics techniques yielded “extraordinary proof” that Thomas Jefferson fathered children with Sally Hemings.

Archaeologists Decode Rules of an Ancient Roman Board Game

FRANZ LIDZ

They scanned the pattern of microscopic imperfections on an ancient limestone slab, and used A.I. to figure out how a game might have been played.

Space weapons, AI safety concerns and the EPA’s rollback of power plant emission rules

From orbital weapons to AI risks and weaker emissions rules

COVID cases are on the rise—here’s how to stay healthy this winter

The virus is currently most prevalent in California and the southern U.S., but experts expect it to go national in the coming weeks

9 ‘boundaries’ keep Earth livable. We’ve breached 7 of them

Earth's annual checkup shows that we're at increasing risk of moving away from the environment we're adapted to