In 1958, Soviet astrophysicist Nikolai A. Kozyrev claimed there was an active volcano on the Moon. Dutch American astronomer Gerard P. Kuiper begged to differ.

Meteorites that come from Mars help scientists understand the red planet’s interior.

Research suggests it was more sudden than that.

Rapid growth also helped other ancient reptiles flourish in the aftermath of mass extinction.

This research team is working out how to detect extraterrestrial cells in the liquid water ocean hidden beneath Enceladus’s icy crust.

IceCube scientists have detected high-energy tau neutrinos from deep space, suggesting that neutrino transformations occur not only in lab experiments but also over cosmic distances.

Observations of an enormous cosmic structure, dubbed the "Big Ring," seem to violate the Copernican principle.

The 43 BCE eruption of Alaska’s Okmok volcano created the (cold) climate context for the fall of the Roman Republic and the birth of the Roman Empire.

Celebrated and damned as the “father of the atomic bomb,” theoretical physicist J. Robert Oppenheimer lived a complicated scientific and political life.

The detection of two celestial interlopers careening through our solar system has scientists eagerly anticipating more.