## black hole

Is the Universe finite or infinite? Is there infinity inside a black hole? Is space infinitely divisible or is there a shortest length? We talk to philosophers and physicists to find out.

In memory of Stephen Hawking we look at the equation he was most proud of.

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.

Since the detection of gravitational waves we know for sure that black holes do exist. To understand what really goes on inside them we need a new theory.

A quick introduction to one of the greatest discoveries of the century.

A quick introduction to the monsters that lurk at the centre of each galaxy.

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

Astronomers have explained a strange effect observed in the vicinity of black holes.

Find out how some black holes are bigger on the inside than they are on the outside.