Got them! Gravitational waves detected – at last

After a false alarm in 2014, those slippery ripples in space-time have been finally snared.

In physics, gravitational waves are ripples in the curvature of spacetime that propagate as a wave, travelling outward from the source. Predicted to exist by Einstein in 1915 on the basis of his theory of general relativity, gravitational waves theoretically transport energy as gravitational radiation.Credit: David Parker / Getty Images