Militocodon lydae, a mammal that looked like a chinchilla but is more closely related cows, roamed what is now Colorado after the nonavian dinosaurs went extinct.

By nudging a thorium-229 nucleus into a higher energy state, physicists have made it possible to develop a nuclear clock that could probe the most fundamental forces in physics. However, there is still a long way to go.

Scientists think Tonga's record-breaking 2022 eruption was triggered by gas building up to a "critical point" rather than by a reaction between magma and seawater as previously assumed.

Is the Wahoo KICKR Bike worth the gasp-inducing price tag?

Just a few laps of the wall a day may be enough to keep muscle wasting at bay, scientists say.

Can chimpanzees wage war? In this excerpt from "The Beast Within: Human as Animals," scientific researcher Jessica Serra looks at the dark side of our cousins' behavior.