The scientists need lunar samples from future Artemis missions to confirm their hypothesis.
The dinosaur-killing asteroid triggered mile-high monster waves and waters that reached the world over.
Buying Guide Looking for the best exercise bikes? Here are our top picks to help you meet your fitness goals from home
Researchers in China have discovered fossilized fragments of an ancient shark-like fish — the oldest jawed vertebrate ever discovered.
Authorities have linked the discovery of a foot inside a shoe to a previously unreported death in Yellowstone National Park on July 31.
Our top picks of the best telescopes for stargazing, from hobbyist astronomy to serious skywatching.