The trio is a rarity—and when all of its unusual traits are considered together, it is unique.

Excavations on unpromising mounds in the Iraqi desert revealed Sumer’s earliest city. Surviving relics and a rebuilt temple ...

New research suggests that the largest cosmic structure is even bigger and closer to Earth than we knew. It goes against ...

In its quest to chart the evolution of the universe, ESA’s space telescope has already amassed a massive catalog of galaxies and gravitational lenses.