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Paleontology

Hyenas roamed the Arctic during the last ice age

Two teeth confirm the idea that hyenas crossed the Bering land bridge into North America, a study finds.

Life

Norovirus close-ups might help fight stomach flu

Detailed views of a common stomach virus that causes vomiting and diarrhea could aid vaccine and disinfectant development.

Particle Physics

Diamond detectors could aid the search for dark matter

Elusive dark matter particles could be spotted when they slam into electrons or atomic nuclei within diamond, scientists say.

Astronomy

Readers boggled by black hole behemoth

Readers had questions about the first image of a black hole and a chytrid fungus.