For most of its history, Earth has existed in a greenhouse state—warm, ice-free, and rich in atmospheric carbon dioxide. The ...

The formation of ice in the atmosphere is a fundamental process that underpins both cloud dynamics and precipitation. Ice nucleation, the initial step in ice formation, occurs when supercooled water ...

From high up in the sky, some of the remotest regions can tell a tale that can be perceived only when viewed from a high ...