Why does time only ever move in one direction? We talk to philosophers of physics Jeremy Butterfield and David Wallace, as well as the eminent Roger Penrose about the puzzle time poses to physicists and what it has to do with the Big Bang and the second law of thermodynamics.
We celebrate Stephen Hawking with some fond memories of his colleagues.
As we are well over half way through advent, we thought today we'd look towards the future of the Universe
On the 17th day of advent we explore the birth and death of stars.
On the fourteenth day of advent, we consider the night sky...which isn't actually black, but permeated by the faint afterglow of the Big Bang.
There are some interesting answers to this question, including that we live in a bubble multiverse!
On the ninth day of advent we find out about the maths of black holes.