News

Astronomy

These cosmic gluttons may be tight

Researchers may have discovered the most tightly bound pair of supermassive black holes known, an indication that two massive galaxies have merged.

Agriculture

Gut bacteria ally with Bt

A new study finds that a particular microbe makes caterpillars susceptible to the insecticide.

Ecosystems

Fish shrinkage reversible, but better hurry

In an experiment, scientists show that, although it takes generations, fish can rebound from evolutionary pressures created by selective harvesting, which has pushed some populations to become small and slow-growing.

Paleontology

Dinosaur handprints reveal birdlike arm anatomy

Inward-facing palms evolved much earlier than previously recognized, a new study finds.