Chemical composition of ancient rocks Iron sulfide can only exist in rocks that were formed before there was oxygen in the atmosphere. Rocks containing iron oxide can only form if oxygen is present.

Urban particles shape climate by influencing clouds and radiation. Vertical monitoring reveals overlooked impacts.

A recent study published in One Earth has uncovered compelling evidence suggesting that the climate effects of new particles ...

Hailstones, a form of solid precipitation, captivate many with their unique journey through the atmosphere. These icy spheroids start as nothing more than droplets in a cloud and grow in layers to ...