This week Adam explores the biological rhythms which control our waking, sleeping and eating patterns - our body clocks.

We're most aware of the biological rhythms which control our waking and sleeping patterns when the clocks change or when we travel to a different time zone and suffer the effects of jet lag. But how do our body clocks actually work? What controls our daily pattern of waking, sleeping and eating? Are there certain times of day when we're at our peak? And what's the best way to minimise the effects of working night shifts?

In this week's Science Café Adam Walton explores both the daily rhythms which human beings live by and the seasonal rhythms which control behaviour like mating and migration in other species. His guests include Russell Foster, Professor of Circadian Neuroscience at Oxford University and author of the book Rhythms of Life.

He speaks to bird biologist Dr. Robert Thomas from the School of Biosciences at Cardiff University and psychologist Dr. Phil Tucker from Swansea University who's investigating the effects of shift work. Adam also meets Gary Ivey from Swansea who describes his own experience of many years of working night shifts.