Space Elevator • 2016 In a Nutshell

Category: Astronomy

It's hard to get to space.But there is a concept that might make it possible: the space elevator. How exactly does it work.

In a Nutshell • 0 • 25 episodes •

What is Dark Matter and Dark Energy?

What is dark energy? What is dark matter? Well, if we knew exactly we would have a nobel prize – we know that they exist though. So what do we know about those strange things?

2015 • Astronomy

What Is Light?

We are so used to some things that we stopped wondering about them. Like light. What is light? Some kind of wavy thing, right? Kind of.

2015 • Physics

How Small is an Atom?

Atoms are very weird. Wrapping your head around exactly how weird, is close to impossible – how can you describe something that is SO removed from humans experience? But then again, they kind of make up everything, so let us try anyways.

2015 • Physics

Everything We Think We Know About Addiction Is Wrong

This video is adapted from Johann Hari's New York Times best-selling book 'Chasing The Scream: The First and Last Days of the War on Drugs.' For more information, and to take a quiz to see what you know about addiction, go to

2015 • Health

Quantum Computers Explained – Limits of Human Technology

Where are the limits of human technology? And can we somehow avoid them? This is where quantum computers become very interesting.

2015 • Technology

The History and Future of Everything -- Time

Time makes sense in small pieces. But when you look at huge stretches of time, it's almost impossible to wrap your head around things.

2015 • History

What is Something?

What is something? On the most fundamental level thinkable, what are things? Why are things? And why do things behave the way they do?

2015 • Physics

The Immune System Explained I – Bacteria Infection

Every second of your life you are under attack. Bacteria, viruses, spores and more living stuff wants to enter your body and use its resources for itself. The immune system is a powerful army of cells that fights like a T-Rex on speed and sacrifices itself for your survival. Without it you would die in no time. This sounds simple but the reality is complex, beautiful and just awesome. An animation of the immune system.

2014 • Health

Overpopulation – The Human Explosion Explained

In a very short amount of time the human population exploded and is still growing very fast. Will this lead to the end of our civilization?

2016 • Economics

What Happens If We Bring the Sun to Earth?

What would happen if we bring a sample (the size of a house) of the Sun to Earth?

2017 • Astronomy

Is Reality Real? The Simulation Argument

"We humans are unable to experience the true nature of the universe..."

2017 • Technology

The Rise of the Machines – Why Automation is Different this Time

Automation in the Information Age is different.

2017 • Technology

How Bacteria Rule Over Your Body – The Microbiome

What happens when microbes talk to your brain?

2017 • Health

Why Age? Should We End Aging Forever?

If you could decide today... how long do you want to live?

2017 • Health

Space Elevator

It's hard to get to space.But there is a concept that might make it possible: the space elevator. How exactly does it work.

2016 • Astronomy

How to Cure Aging – During Your Lifetime?

What if we could stop aging forever?

2017 • Health


How can many stupid things combine to form smart things? How can proteins become living cells? How become lots of ants a colony? What is emergence?

2017 • Science

Universal Basic Income Explained – Free Money for Everybody? UBI

What is UBI? How would free money change our lives.

2017 • Economics

How Far Can We Go? Limits of Humanity.

Is there a border we will never cross? Are there places we will never be able to reach, no matter what? It turns out there are. Far, far more than you might have thought…

2016 • Astronomy

Why Alien Life Would be our Doom - The Great Filter

Finding alien life on a distant planet would be amazing news - or would it? If we are not the only intelligent life in the universe, this probably means our days are numbered and doom is certain.

2018 • Astronomy

String Theory Explained – What is The True Nature of Reality?

Is String Theory the final solution for all of physic’s questions or an overhyped dead end?

2018 • Physics

Homeopathy Explained – Gentle Healing or Reckless Fraud?

What are the principles behind Homeopathy and does it work?

2018 • Health

A Selfish Argument for Making the World a Better Place – Egoistic Altruism

Why should you care about the well-being of people half a globe away?

2018 • Economics

The Deadliest Being on Planet Earth – The Bacteriophage

A war has been raging for billions of years, killing trillions every single day, while we don’t even notice. This war involves the single deadliest being on our planet: The Bacteriophage.

2018 • Science

How We Could Build a Moon Base TODAY – Space Colonization 1

Did you know that we could start building a Lunar Base today?

2018 • Astronomy

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Lift Off

Kevin explores and probes second by second what it takes to 'lift off' into space. With Tim only days into his six-month mission, he helps Kevin answer what keeps astronauts safe and on track as they are propelled into orbit. How do you control the energy of 300 tonnes of liquid fuel? What happens to your body if you don't wear a spacesuit? And how do you catch up with a space station travelling at 17,500 mph to finally get inside? With explosive live experiments, guest astronauts in the lecture theatre, and planetary scientist Monica Grady direct from the launch pad in Kazakhstan, we learn all this and more as those thrilling minutes of lift off are recreated.

1/3How to Survive in Space • 2015 • Astronomy

Harmony of the Worlds

Beginning with the separation of the fuzzy thinking and pious fraud of astrology from the careful observations of astronomy, Sagan follows the development of astronomical observation. Beginning with constellations and ceremonial calendars (such as those of the Anasazi), the story moves to the debate between Earth and Sun-centered models: Ptolemy and the geocentric worldview, Copernicus' theory, the data-gathering of Tycho Brahe, and the achievements of Johannes Kepler (Kepler's laws of planetary motion and the first science-fiction novel).

3/13Cosmos: A Personal Voyage • 1980 • Astronomy

Star Clusters

Last week we covered multiple star systems, but what if we added thousands or even millions of stars to the mix? A star cluster. There are different kinds of clusters, though. Open clusters contain hundreds or thousands of stars held together by gravity. They’re young, and evaporate over time, their stars let loose to roam space freely. Globular clusters, on the other hand, are larger, have hundreds of thousands of stars, and are more spherical. They’re very old, a significant fraction of the age of the Universe itself, and that means their stars have less heavy elements in them, are redder, and probably don’t have planets (though we’re not really sure).

35Crash Course Astronomy • 2015 • Astronomy

Is Anybody Out There?

In August 1977, the Big Ear Radio-telescope in Ohio received a strange signal from the Sagittarius constellation while searching for intelligent extra-terrestrial life. It had a duration of 72 seconds and an intensity 30 times higher than usual. Named the WAW signal (as an engineer wrote ‘WOW’ on the data as it came in!), it is still being considered as one of the best examples of having being sent by intelligent extraterrestrial life. But, nothing has revolutionised the search of extra-terrestrial intelligent life as much as the recent discovery by the Kepler Satellite, of thousands of Earth-like planets where life could be possible. Join the debate with this stunning one-hour documentary from 2015, as we ask Is Anybody Out There?

2015 • Astronomy

Surviving on Mars

From a greenhouse in Holland to a desert landscape in Iceland, scientists are using the earth to tests ways to keep a Mars settlement alive and well. It’s the ultimate survival challenge, requiring major innovations to find water, grow food and clean the air.

4/5Destination Mars • 2015 • Astronomy


Saturn's secrets are out. The ferocious weather, the evolving ring system and the discovery of active geology on Saturn's moons has rewritten the textbooks. Scientists are looking for life on Saturn's moons and they may have found it on Titan.

S3E5How the Universe Works • 2014 • Astronomy