News

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.

Earth

Is a long-dormant Russian volcano waking up? It’s complicated

Scientists debate how to interpret seismic activity near Bolshaya Udina on the remote Kamchatka Peninsula.

Ecosystems

Many of the world’s rivers are flush with dangerous levels of antibiotics

Antibiotic pollution can fuel drug resistance in microbes.