Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 46 · Episode 5 ·
The Secret Life of Your Bodyclock
Why are you more likely to have a heart attack at eight o'clock in the morning or crash your car on the motorway at two o'clock in the afternoon? Can taking your medication at the right time of day really save your life? And have you ever wondered why teenagers will not get out of bed in the morning? The answers to these questions lie in the secret world of the biological clock.
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Episode 5 of season 46 of Horizon: “The Secret Life of Your Bodyclock”. Aired 2009-02-24. Watch it online free on ZapFlix.