At Stephen Hawking's 70th birthday symposium we talked to Astronomer Royal Martin Rees, some of Hawking's former students, and his graduate assistant.
Are the unchanging numbers that define our universe really unchanging?
Find out why scientists trying to build quantum computers might do worse than talk to birds.
If you have ever been in an MRI scanner you'll appreciate David Donoho's work, which has revolutionised this imaging technique.
The furore around the MMR vaccine and autism has shown that vaccination can be an emotive issue. We talk to an expert about the math used to make sure it's safe.