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Animals

Octopus arms are adaptable but some are favored for particular jobs

Octopuses are ambidextrous, a new study finds, but they favor their front arms for investigating surroundings and their back arms for locomotion.

Paleontology

Crystallized dino eggs provide a peek into the tumultuous Late Cretaceous

Definitively dating the age of a clutch of fossil dinosaur eggs at a famous site in China may let scientists link eggshell features to environmental shifts at the time.

Physics

A ‘ringing’ black hole matches scientists’ predictions

Gravitational waves emitted after two black holes coalesced agree with theories from physicists Stephen Hawking and Roy Kerr.