On the fifth day of advent we learn about the heroic effort that led to the detection of gravitational waves and the excitement of their discovery.
How does LIGO detect gravitational waves? Here is a quick introduction.
Did you know that every instant, gravity waves from outer space are stretching and squeezing you - and everyone and everything else in the universe? Learning more about this mysterious radiation will help us to probe the structure and origins of the universe, explains Anita Barnes.