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The 24-hour rhythms that govern life

Horizon takes a look at the biological clocks in people, animals and plants this October. Image credit: Flickr/ Ross2085
Horizon takes a look at the biological clocks in people, animals and plants this October. Image credit: Flickr/ Ross2085

As the clocks go back this October, Horizon takes a moment to look at the 24-hour rhythms that govern life. We talk to scientists trying to alter the internal clocks of our cells to help fight obesity and diabetes, and others working out the best time for each patient to take medicines. We also learn how tobacco plants can change their body clocks in a last-ditch attempt to survive when they’re threatened by predators or food scarcity.