Up early or lying in: why we need different amounts of sleep – Science Weekly podcast

Requiring minimal amounts of sleep is sometimes seen as a badge of honour. But for many of us, being able to actually function is a different matter altogether. So why is it that some people seem to need more or less sleep? And what are some of the ramifications if we don't get enough? Hannah Devlin speaks to two experts whose work is bringing new understanding to our sleeping behaviours