In this episode we revisit an interview with Ken Ono about the remarkable Indian mathematician Srinivasa Ramanujan, one of the most fascinating figures in the history of mathematics.

Entropy is the hero of our story – bringing together physics at every scale.

Come on a fantastic journey from some of our oldest ideas about physics to the biggest mystery of the modern age!

Over the last few decades physicists have been developing a curious idea. Perhaps the world we inhabit is a hologram, lacking a crucial feature of the world as we perceive it: the third dimension.

This collection of articles looks at one of the biggest problems in modern physics and at research that aims to solve it.

We discuss new and fascinating observations of gravitational waves with three of our favourite cosmologists.

On the twelfth day of advent we celebrate Stephen Hawking's contribution to cosmology.

On the eleventh day of advent we explore an unresolved puzzle concerning black holes which greatly intrigued Stephen Hawking.

Now we think we know all about black holes, here is another surprise: they are not completely black after all.

On the ninth day of advent we find out about the maths of black holes.

Behind door #8 we answer all the questions you've ever wanted to ask about the physical reality of black holes!

On the seventh day of advent we venture to a dark place we will never return from