The odd atmosphere of a fledgling exoplanet is causing astronomers to question leading theories of how planets form.

Researchers analyzed radioisotopes in layers of fossilized volcanic ash. Decay of uranium to lead within tiny crystals enabled scientists to precisely pinpoint dates for certain events. They ...

Scientists recorded a total-column ozone concentration of 102 Dobson units, the 8th-lowest level since 1986. Colder-than-average temperatures and strong winds in the stratosphere circling Antarctica ...

After taking the first images of black holes, the Event Horizon Telescope (EHT) is poised to reveal how black holes launch ...