3/10 How Joseph Fourier's mathematics transformed our understanding of heat, light and sound.
BBC Radio 4
Is there a hidden epidemic of mental illness among soldiers who've served in Afghanistan?
2/10 How a solution to a 1700s conundrum enables us to access information on the internet.
11/40 Brett Westwood and guests question the language used in wildlife conservation.
1/4 With Brian Cox and Robin Ince, recorded at the Cheltenham Science Festival.
1/10 An astronaut and an investment analyst pay homage to the enormous power of the calculus.
1/4 David Goldblatt finds out why Italians are so passionate about football in Milan.
BBC World Service
Mike goes to the TT Races, messes with an electric bike, and hears how to paint a mountain
The personal and spiritual journeys of people who spent years in captivity.
Alpa Shah gets exclusive access to Maoist guerillas in India.