The Universe • 2011 • episode "S1E2" James May's Things You Need to Know

Category: Astronomy
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James May takes a journey of discovery across the universe.

James May's Things You Need to Know • 0 • 9 episodes •

Einstein

James May reveals a world of facts about Albert Einstein and his groundbreaking theories.

2012 • People

The Human Body

James uses motion graphics to help find the answers to key questions about the human body

2011 • Health

The Universe

James May takes a journey of discovery across the universe.

2011 • Astronomy

The Weather

James May asks the big questions about the weather, including what is a cloud?

2011 • Environment

The Brain

James May cranks open your cranium to reveal what's really taking place inside your head.

2012 • Brain

Evolution

James May treks into the wilderness to learn about Darwin's theory of natural selection.

2012 • Nature

Speed

James May rapidly and easily explains all you need to know about speed.

2012 • Physics

Engineering

James May gives a nuts and bolts explanation of the fascinating science of engineering.

2012 • Nature

Chemistry

James May distills the secrets of all you need to know about chemistry.

2012 • Science

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Misconceptions About the Universe

The expanding universe is a complicated place. During inflation the universe expanded faster than light, but that's something that actually happens all the time, it's happening right now. This doesn't violate Einstein's theory of relativity since nothing is moving through space faster than light, it's just that space itself is expanding such that far away objects are receding rapidly from each other. Common sense would dictate that objects moving away from us faster than light should be invisible, but they aren't. This is because light can travel from regions of space which are superluminal relative to us into regions that are subluminal. So our observable universe is bigger than our Hubble sphere - it's limited by the particle horizon, the distance light could travel to us since the beginning of time as we know it.

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Who's Afraid of a Big Black Hole?

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 answering the ultimate question: what was there before the big bang?

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Is Anyone Out There?

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