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Horizon

BBC TwoDocumentary · 62 seasons

7.5TMDB

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Season 45

E1E1How to Kill a Human BeingTue, Jan 15 · 60 min
E2E2Total IsolationTue, Jan 22 · 60 min
E3E3What on Earth is Wrong With Gravity?Tue, Jan 29 · 60 min · ★ 9.0
E4E4Is Alcohol Worse than Ecstasy?Tue, Feb 5 · 60 min
E5E5How to Make Better DecisionsTue, Feb 12 · 60 min
E6E6How to Live to be 101Tue, Feb 19 · 60 min
E7E7Prof. Regan's Supermarket SecretsTue, Feb 26 · 60 min
E8E8Are we Alone in the Universe?Tue, Mar 4 · 60 min
E9E9How Much is Your Dead Body Worth?Tue, Mar 18 · 60 min
E10E10How Does Your Memory Work?Tue, Mar 25 · 60 min
E11E11The President's Guide to ScienceTue, Sep 16 · 60 min
E12E12How Mad Are You? (1 of 2)Tue, Nov 11 · 60 min
E13E13How Mad Are You? (2 of 2)Tue, Nov 18 · 60 min
E14E14Jimmy's GM Food FightTue, Nov 25 · 60 min
E15E15Do You Know What Time It Is?Tue, Dec 2 · 60 min
E16E16Allergy PlanetTue, Dec 9 · 60 min
E17E17Where's My Robot?Tue, Dec 16 · 60 min

Questions

Where can I watch Horizon?

Horizon streams on PBS.

How many episodes are in Season 45?

Season 45 has 17 episodes.

Episode roomHorizon S45 E16

Horizon · Season 45 · Episode 16

Allergy Planet

Tuesday, December 9 · 60 min

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We are in the grip of an allergy epidemic. Fifty years ago one in 30 were affected, but in Britain today it is closer to one in three. Why this should be is one of modern medicine's greatest puzzles. In search of answers, Horizon travels round the globe, from the remotest inhabited island to the polluted centres of California and the UK. We meet sufferers and the scientists who have dedicated their lives trying to answer the mystery of why we are becoming allergic to our world.

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