A punk-rock Supergirl is a welcome, jagged riff on more buttoned-up superheroes, and Milly Alcock is terrific in the role. If ...

A proposed technique to counter global warming by spraying sun-reflecting particles near the poles would cause commercial ...

Ammonia rarely makes headlines, but much of modern life depends on it. The compound of nitrogen and hydrogen is the key ingredient in the fertilizers that help feed roughly half of the world’s ...