Physicists isolated the ‘last sound’ of a black hole collision, providing an unprecedented glimpse of the region right next ...

The Bullet Cluster of galaxies might only have half as much dark matter than scientists thought, or perhaps even none at all, ...

From a marathon milestone on Mars to a sky filled with satellite trails above Chile’s deserts, this week’s collection ...

A best-yet measurement of one of general relativity’s most mind-boggling effects is “another feather in Einstein’s cap” ...