A radio telescope in South Africa has unearthed a giant galaxy—dubbed a "cosmic megastructure"—with plasma jets that measure ...

The size and spin of black holes can reveal how and where they were born, and gravitational waves offer a way to decode this information like a cosmic DNA test.

The grim confirmation of Sione Tuipulotu's Six Nations-ending injury was expected but it still landed with a thud nonetheless. Tuipulotu is one of the form inside centres in the game; a captain, a ...