Episode guide

Horizon: 2009

18 episodes · first aired Jan 26, 2009

TMDB has no overview for this season.

Back to Horizon: cast and where to watch

1 Why Are Thin People Not Fat? Jan 26, 2009 · 1h The world is affected by an obesity epidemic, but why is it that not everyone is succumbing? Medical science has been obsessed with this subject and is coming up with some unexpected…
2 Cannabis: The Evil Weed? Feb 3, 2009 · 1h Cannabis is the world's favourite drug, but also one of the least understood. Can cannabis cause schizophrenia? Is it addictive? Can it lead you on to harder drugs? Or is it simply a herb…
3 Why Do We Dream? Feb 10, 2009 · 1h Horizon uncovers the secret world of our dreams. In a series of cutting-edge experiments and personal stories, we go in search of the science behind this most enduring mystery and ask…
4 Can We Make a Star on Earth? Feb 17, 2009 · 1h Professor Brian Cox takes a global journey in search of the energy source of the future. Called nuclear fusion, it is the process that fuels the sun and every other star in the universe…
5 The Secret Life of Your Bodyclock Feb 24, 2009 · 1h 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…
6 What's the Problem with Nudity? Mar 3, 2009 · 1h What is wrong with nudity? Why are people embarrassed about their bodies? How and why did they get the way they are? Horizon takes a group of volunteers and subjects them to a series of…
7 How to Survive a Disaster Mar 10, 2009 · 1h When disaster strikes who lives and who dies is not purely a matter of luck. In every disaster, from those people face once in a lifetime, to those they face every day, there are things…
8 Who Do You Want Your Child to Be? Mar 17, 2009 · 1h David Baddiel, father of two, sets out to answer one of the greatest questions a parent can ask: how best to educate your child. Taking in the latest scientific research, David uncovers…
9 Why Can't We Predict Earthquakes? Mar 24, 2009 · 1h Last century, earthquakes killed over one million, and it is predicted that this century might see ten times as many deaths. Yet when an earthquake strikes, it always takes people by…
10 Alan and Marcus Go Forth and Multiply Mar 31, 2009 · 1h Ever since he was at school, actor and comedian Alan Davies has hated maths. And like many people, he is not much good at it either. But Alan has always had a sneaking suspicion that he…
11 How Violent Are You? May 12, 2009 · 1h What makes ordinary people commit extreme acts of violence? Michael Portillo investigates the dark side of human nature, and discovers what it is like to inflict pain.
12 Do I Drink Too Much? Dec 22, 2009 · 1h Do I Drink Too Much? Alcohol is by far the most widely used drug - and a dangerous one at that. So why are so many of us drinking over the recommended limits? Why does alcohol have such a…
13 The Secret You Dec 22, 2009 · 1h With the help of a hammer-wielding scientist, Jennifer Aniston and a general anaesthetic, Professor Marcus du Sautoy goes in search of answers to one of science's greatest mysteries: how…
14 Fix Me Dec 22, 2009 · 1h
15 Who's Afraid of a Big Black Hole? Dec 22, 2009 · 1h Black holes are one of the most destructive forces in the universe, capable of tearing a planet apart and swallowing an entire star. Yet scientists now believe they could hold the key to…
16 Why Do We Talk? Dec 22, 2009 · 1h Talking is something that is unique to humans, yet it still remains a mystery. Horizon meets the scientists beginning to unlock the secrets of speech - including a father who is filming…
17 How Long is a Piece of String? Dec 22, 2009 · 1h Alan Davies attempts to answer the proverbial question: how long is a piece of string? But what appears to be a simple task soon turns into a mind-bending voyage of discovery where nothing…
18 How Many People Can Live on Planet Earth? Dec 9, 2009 Naturalist Sir David Attenborough investigates whether the world faces a population crisis and if it is the duty of individuals to change the way they live.