What is Dark Matter and Dark Energy? • 2015 In a Nutshell

Category: Astronomy

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?

In a Nutshell • 0 • 26 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 www.chasingthescream.com

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

Why Meat is the Best Worst Thing in the World ??

Meat is a complicated issue. But also a delicious one. Let's talk about it.

2018 • Environment

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Gamma-Ray Bursts

Gamma-ray bursts are not only incredible to study, but their discovery has an epic story all its own. Today Phil takes you through some Cold War history and then dives into what we know. Bursts come in two rough varieties: Long and short. Long ones are from hypernovae, massive stars exploding, sending out twin beams of matter and energy. Short ones are from merging neutron stars. Both kinds are so energetic they are visible for billions of light years, and both are also the birth announcements of black holes.

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Introduction to the Solar System

In today's Crash Course Astronomy, Phil takes a look at the explosive history of our cosmic backyard. We explore how we went from a giant ball of gas to the system of planets and other celestial objects we have today.

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Per Aspera Ad Astra

"It is beyond our powers to predict the future"

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7 Ages of Starlight

This is the epic story of the stars, and how discovering their tale has transformed our own understanding of the universe. Once we thought the sun and stars were gods and giants. Now we know, in a way, our instincts were right. The stars do all have their own characters, histories and role in the cosmos. Not least, they played a vital part in creating us. There are old, bloated red giants, capable of gobbling up planets in their orbit; explosive deaths - supernovae - that forge the building blocks of life; and black holes, the most mysterious stellar tombstones. And, of course, stars in their prime, like our own sun. Leading astronomers reveal how the grandest drama on tonight is the one playing above our heads.

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The Earth

Phil starts the planet-by-planet tour of the solar system right here at home, Earth.

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Do we live in a multiverse?

It has long been thought that our universe is all there is, but it is possible we may live in just one of many.

The Economist • 2015 • Astronomy