Answers to Science Questions

Fingernails seem to have obvious uses but what are our toenails for? Sam Mahaffey goes in search of a gripping answer.

Why does a major keen sound happy and a minor key sound mournful?

Where are we within the universe? Joanna Kerr asks astrophysicist Dr Sean McGee from the University of Birmingham.

Are wormholes science fact or fiction? James Farr investigates...