We have trillions of body clocks — a central one in the brain and others in each cell of our body. Here's how they work with light to control our health. Exposure to light is crucial for our ...

It’s thought humans produce more antibodies to fight off winter illness. If you were left in the dark, your body clock would become out of step with the 24-hour clock. There are sensors in your ...

The body clock - or circadian rhythm - is the reason we want to sleep at night, but it also drives huge changes in behaviour and body function. The US scientists Jeffrey Hall, Michael Rosbash and ...