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Horizon

BBC TwoDocumentary · 62 seasons

7.5TMDB

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Season 46

60mE1Why Are Thin People Not Fat?Mon, Jan 26
E2E2Cannabis: The Evil Weed?Tue, Feb 3 · 60 min
E3E3Why Do We Dream?Tue, Feb 10 · 60 min
E4E4Can We Make a Star on Earth?Tue, Feb 17 · 60 min
E5E5The Secret Life of Your BodyclockTue, Feb 24 · 60 min
E6E6What's the Problem with Nudity?Tue, Mar 3 · 60 min · ★ 2.0
E7E7How to Survive a DisasterTue, Mar 10 · 60 min
E8E8Who Do You Want Your Child to Be?Tue, Mar 17 · 60 min
E9E9Why Can't We Predict Earthquakes?Tue, Mar 24 · 60 min
E10E10Alan and Marcus Go Forth and MultiplyTue, Mar 31 · 60 min · ★ 6.0
E11E11How Violent Are You?Tue, May 12 · 60 min
E12E12Do I Drink Too Much?Tue, Dec 22 · 60 min
E13E13The Secret YouTue, Dec 22 · 60 min
E14E14Fix MeTue, Dec 22 · 60 min
E15E15Who's Afraid of a Big Black Hole?Tue, Dec 22 · 60 min
E16E16Why Do We Talk?Tue, Dec 22 · 60 min
E17E17How Long is a Piece of String?Tue, Dec 22 · 60 min
E18How Many People Can Live on Planet Earth?Wed, Dec 9

Questions

Where can I watch Horizon?

Horizon streams on PBS.

How many episodes are in Season 46?

Season 46 has 18 episodes.

Episode roomHorizon S46 E5

Horizon · Season 46 · Episode 5

The Secret Life of Your Bodyclock

Tuesday, February 24 · 60 min

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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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