Scientists studying a rock sample collected by NASA’s Curiosity rover have uncovered something tantalizing: the largest organic molecules ever detected on Mars. The compounds — decane, undecane, and ...

A bizarre fossil called Prototaxites, which was the largest life-form on land 400 million years ago, may have been a completely unknown form of multicellular life, according to a new study.

Scientists have uncovered incredible truths about the universe, yet some mysteries still refuse to show us an explanation.

Physicists are building detectors so sensitive that they may succeed in unraveling one of the greatest mysteries in modern physics: the true nature of dark matter.

Across the quiet darkness of space and the buried detectors under Antarctic ice, a set of stubborn anomalies is piling up.

Frogs are descendants of some of the first vertebrates to leave the water, and their survival story stretches back hundreds of millions of years. Built around explosive jumps, stealth, and a ...