Sharks predate trees, dinosaurs, and the rings of Saturn. Across more than 400 million years, they have outlasted five mass ...

Scientists have uncovered evidence of an enormous organism that once dominated Earth’s land surfaces some 400 million years ago long before trees, dinosaurs, or even large animals evolved. The ...

One of the most devastating extinctions in Earth's history is best known for what didn't die—dinosaurs. But the end-Triassic ...

Hundreds of millions of years ago, Earth’s magnetic field behaved in a way that has long baffled scientists, showing wild and seemingly chaotic shifts unlike anything seen before or since. A new study ...