Dr Chris Smith and the Naked Scientist team look at the latest science news. Including the news that Chris Hoy has revealed his diagnosis with terminal prostate cancer, the WHO has declared that Egypt is malaria-free, and the impact clock changes have on our perception of time.

Plus, an in-depth look at the Europa Clipper, the NASA spacecraft which has begun a voyage to look for the conditions for life on one of Jupiter's moons.

For support on topics covered in this programme, you can get details of organisations within the UK by visiting the BBC Action Line website - bbc.co.uk/actionline.