The Fourier transform is a piece of maths that is, almost single-handedly, responsible for the digital revolution. We asked Chris Budd what the Fourier
transform does, and how it does it. This podcast accompanies the Plus
article Saving lives: The mathematics of tomography.
We asked cosmologist Pau Figueras everything we’ve ever wanted to know about black holes. In this podcast he explains what black holes are, physically, and how we hope to observe them.
It's the time of the year for cough sweets, flu medication and paracetamol. But how do we know these and other medicines really work?