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.

Find out what gravitational waves will tell us about the Universe: from understanding its birth to figuring out whether black holes have hairs.

Find out 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.

Gravitational waves have opened a new window on the Universe. Find out what they are, how they were detected, and what they promise to reveal.

The newly observed ripple in spacetime will help us unlock some of the secrets of the Universe.