Scientists working at the LIGO experiment in the US have for the first time detected elusive ripples in the fabric of space and time known as gravitational waves. There is no doubt that the finding is one of the most groundbreaking physics discoveries of the past 100 years. But what are they? To best understand ...
Explainer: gravitational waves and why their discovery is such a big deal
By Gren Ireson
14 Feb 2016