Marine cloud brightening could cool part of the Pacific and weaken extreme El Niños, simulations suggest. But the approach could have risks.

There’s never been a good method to check for violations of the Outer Space Treaty’s prohibition of nuclear weapons in space.

The gold standard of scientific review, peer review by researchers’ colleagues, is in crisis. AI might offer a solution but has problems of its own.

The ambitious expedition aims to fill data gaps about the glacier-sea boundary to predict when the world might tip into a catastrophic climate regime.

A whole-genome analysis of Beefalo, a hybrid bison-cattle breed, suggests very few individuals have any bison DNA at all, a new study reports.