Kurzgesagt – In a Nutshell

The brain is the most complex known biological structure. Around 100 billion neurons are communicating via one million billion connections, which are sending signals up to 1000 times a second, which is one quadrillion events every second of your waking life! And it’s not just neurons. There are billions of supporting and immune cells of various types performing different jobs. On a macro level, the brain can be divided into sections with different roles, from breathing and heart rate to coordinating movement and involuntary reflexes. The most developed parts, the neocortex or the outermost layer of the brain, hold memories, our ability to plan, think and imagine, hope and dream. Where exactly the “you” part of your brain is situated is not entirely clear. We know that areas like the precuneus cortex have the greatest influence on our consciousness but also that several areas can network together to perform tasks none of them can do alone.

3 days ago | [YT] | 10,000

Kurzgesagt – In a Nutshell

Back in 1932, Australia went to war against the most unusual enemy. It wasn't another country or an invading army. It was a flock of 20,000 emus! They invaded and devastated farmers' wheat fields and the government had no other option but to take out the big guns, literally. What followed has since become one of the strangest military operations in the history: the Great Emu War.

6 days ago | [YT] | 2,006

Kurzgesagt – In a Nutshell

How do your immune cells, such as macrophages, recognize and protect you from bacteria and other invaders?
Cells don’t have eyes or ears, so to tell a friend from the enemy, they have to touch them and recognize if their protein is part of a friend or part of an enemy. Proteins are the building blocks of life and can have billions of different shapes. Your enemies can put them together in millions of different ways to construct their bodies, so your immune cells had to develop a way to recognize them. Recognizing means that cells have countless tiny devices, called receptors, that are able to connect with a specific protein. When a cell connects together with a protein and recognizes it as “enemy”, it knows that it has to attack.

2 weeks ago | [YT] | 9,293

Kurzgesagt – In a Nutshell

This might or might not be a scene from the new video we uploaded yesterday... 👀

2 weeks ago | [YT] | 15,706

Kurzgesagt – In a Nutshell

Have you ever wondered what Henry VIII's love life would look like as a gaming speedrun? Well, our ‪@nightshift_kurzgesagt‬ team has.

3 weeks ago | [YT] | 1,184

Kurzgesagt – In a Nutshell

Your favorite shirt of the summer now comes with a very special souvenir from space!

Get a free set of Space Tour Patches when you buy a Space Tour Shirt this summer* ✨
Suit up, secure your free patches, and browse a few more cosmic essentials for the journey: shop.kgs.link/SummerSpaceTour

*Starting from 23.06.2026 until 07.07.2026, when you purchase the Space Tour Shirt in the kurzgesagt shop, you will receive a free set of Space Tour Patches. This offer is valid while supplies last.✨

1 month ago | [YT] | 2,155

Kurzgesagt – In a Nutshell

STAR BIRDS IS ON MAC NOW!
Many of you have asked for it, and after months of work, here it finally is: Star Birds is now officially on Mac! 🚀 No need to wait for RAM prices to go down to build your own PC, play Star Birds now on Steam: kgs.link/starbirds

1 month ago | [YT] | 4,804

Kurzgesagt – In a Nutshell

Our satellites orbit the Earth, and so does the Moon … but what does that even mean?

We know that Earth’s gravity pulls everything towards it, including the Moon. But it somehow stays up, as if suspended by some opposite force. The truth is, there is no other force countering gravity. Instead, the trick to staying up is a ‘sideways’ motion that we call an orbit. An orbit is a curved path in a shape of a circle or an oval. Staying in orbit means moving around the Earth at a certain velocity. Small orbits need higher velocities. Large orbits need lower velocities. In fact, you see orbits every day! Any ball you throw makes a tiny orbit as well. The only difference between that ball’s orbit and the Moon’s is that the ball eventually hits the ground. Basically, the reason is speed. If you could throw your ball fast enough, it would bend around the world and come back to you. If there was no air slowing it down, it could orbit forever. And When you throw a ball, it makes a tiny orbit as well. This is what the Moon does: falling sideways around earth, very fast, with no air slowing it down. Orbiting Earth every 27 days, at 3600 km/h.

1 month ago | [YT] | 7,592

Kurzgesagt – In a Nutshell

Our latest Nightshift video covers a mysterious queen who challenged one of the largest empires in history. Feared by her enemies and celebrated by her descendants, she became one of the greatest legends and symbols of resistance.

1 month ago | [YT] | 2,277