Educational

How to See a Black Hole: The Universe’s Greatest Mystery

Of all the wonders in our cosmos, one object has remained hidden to the greatest scientific minds, that being a black hole. A region of space where the pull of gravity is so powerful that nothing at all can escape if it passes the event horizon. This is a specific limit that surrounds a black hole, it separates what is inside and what is outside. Once anything crosses that boundary, it is gone fo

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How To Mend A Broken Heart

Dr Kevin Fong finds out how close scientists are to being able to mend your heart if it stops working. He meets some of the people who have undergone pioneering heart operations and the scientists who are pushing the limits of cardiac treatment. We meet a man who has had his heart replaced with an artificial one powered by a mechanical pump he carries around in a rucksack, and witness a scientist

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How To Build A Satellite

Some of the best and most up-to-date communication satellites in the world are designed and built in Stevenage in Britain. With exclusive access to specialist manufacturer Astrium, this programme shows step-by-step how to assemble one of the most complicated machines in the world.The team is followed as they construct a massive communication satellite; from the inner carbon-fibre skeleton to t

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How the States Got Their Shapes

Every line on the U.S. map tells a story. Every border reflects their history – their struggles for independence, their internal conflicts over states rights and slavery, their westward expansion, and the mastery of their natural resources. They are so familiar with the map of United States, but do they know why their states look the way they do? Every shape on the map tells a great story about th

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How Stuff Works: Secrets of Chocolate

There are many incredible things in this world that we simply take for granted. Maybe because they're commonplace, or maybe because we're just used to seeing them around. But the truth is, each of these seemingly mundane items has a fascinating story behind it. Prepare to be amazed!It fueled the Aztecs, helped win WW2, transformed TV and may save the rainforest. Go inside the intricate science

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How small is the Universe

Horizon plunges down the biggest rabbit-hole in history in search of the smallest thing in the Universe. It is a journey where things don't just become smaller but also a whole lot weirder. Scientists hope to catch a glimpse of miniature black holes, multiple dimensions and even parallel Universes. As they start to explore this wonderland, where nothing is quite what it seems, they may have to rew

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How Many People Can Live On Planet Earth

In a Horizon special, naturalist Sir David Attenborough investigates whether the world is heading for a population crisis.In his lengthy career, Sir David has watched the human population more than double from 2.5 billion in 1950 to nearly seven billion. He reflects on the profound effects of this rapid growth, both on humans and the environment.While much of the projected growth in human popu

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