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Horizon
S46E17 · How Long is a Piece of String?
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Episodes
E1
Why Are Thin People Not Fat?
2009-01-26
E2
E2
Cannabis: The Evil Weed?
2009-02-03
E3
E3
Why Do We Dream?
2009-02-10
E4
E4
Can We Make a Star on Earth?
2009-02-17
E5
E5
The Secret Life of Your Bodyclock
2009-02-24
E6
E6
What's the Problem with Nudity?
2009-03-03
E7
E7
How to Survive a Disaster
2009-03-10
E8
E8
Who Do You Want Your Child to Be?
2009-03-17
E9
E9
Why Can't We Predict Earthquakes?
2009-03-24
E10
E10
Alan and Marcus Go Forth and Multiply
2009-03-31
E11
E11
How Violent Are You?
2009-05-12
E12
E12
Do I Drink Too Much?
2009-12-22
E13
E13
The Secret You
2009-12-22
E14
E14
Fix Me
2009-12-22
E15
E15
Who's Afraid of a Big Black Hole?
2009-12-22
E16
E16
Why Do We Talk?
2009-12-22
E17
E17
NOW
How Long is a Piece of String?
2009-12-22
E18
How Many People Can Live on Planet Earth?
2009-12-09