Kurzgesagt posts
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New Video: Black Hole’s Evil Twin – Gravastars Explained
Gravastars could change how we think about the universe. These cosmic objects solve black holes’ biggest problems without breaking physics. From their ultra-thin shell to their energy-filled core, gravastars are both elegant and terrifying. But what exactly are they?
New Video: Vaping Is Too Good To Be True
Vaping is marketed as the “safe” alternative to smoking, but it’s far from being harmless. Unregulated ingredients, hidden toxins, and extreme nicotine levels mean we’re conducting a massive experiment on ourselves. Let’s dive into what we know – and what we don’t know, yet.
New Video: We Have To Talk About Weed
Cannabis is finally being decriminalized in more and more places around the world. And for very good reasons! Compared to other legal drugs such as alcohol, cannabis is pretty mild and most users enjoy it without issue. But there’s a dark side for some. So let’s take an honest look at some of th...
Patreon Exclusive 1h Early Access: Existential Merch Collection
Our latest drop collection has arrived, just in time for the holidays!We’re known for causing a bit of “light” existential dread from time to time, but the truth is – we do it to inspire you. That’s why we created the Existential Collection to do both!❤ As a Patron, you can get it here, ...
New Video: The Man Who Invented A Single Weapon To Destroy The World
At the height of the Cold War, a terrifying concept emerged: a bomb so powerful it wouldn’t need to be dropped. Known as Project Sundial, this doomsday device would have left a 400-km radius in flames and plunged the world into darkness. It was a bomb that would destroy everything – not a weapon...
Early Video Release – Exclusively for Our Patrons
Dear Birbs,Ever heard the claim that your blood vessels could wrap around Earth twice at 100,000 kilometers long? We did, and it blew our minds! So much so that we invested over a year to verify it. Spoiler: the truth is a bit tangled. Dive into our investigative journey filled with outdated science...
The Art of Crafting Thumbnails: Behind the Scenes
Today, we’d like to take you behind the scenes to explore a crucial, yet often overlooked part of our process: the creation of thumbnails. They are the gateway to our videos, and have to meet a few key characteristics: They must give a quick first insight into what the video is about, they have to...
New Video: A New Perspective On Your Life And Humanity
Being alive right now can feel overwhelming. The enormous global problems we are facing fill many of us with doom and hopelessness. And it’s true, we feel it too. But without minimizing the darkness, we want to add a story we personally find helpful for dealing with the state of the world right no...
NEW VIDEO: What’s Hiding In The Deepest Hole On Earth?
We’ve found a new planet, home to octillions of the most extreme beings living in the most absurd and deadly hellscape. In absolute darkness, crushed by the weight of mountains, starved of oxygen, cooked alive, bathed in acid, salt, or radiation, they live for thousands, perhaps millions of years!...
Patreon Exclusive Early Access: 12,025 Human Era Calendar
YOUR EARLY ACCESS STARTS NOW – one week before the official launch!Thanks to your support on Patreon, we're able to create science videos and make science accessible to everyone, and that is why we'd like to give you a super early access to our 12,025 Human Era Calendar!✨ Get it now, a f...
23 Million Birbs – Thank You for Being One of Them!
We reached 23 Million subscribers! ✨Another million birbs have joined our birb nest, and we are amazed by what this community has become. We wouldn't have been able to come this far without the help of patrons like yourself. Thank you for your continuous support and thank you for sharing this ...
NEW VIDEO: This Video Will Save Your Life Next Week
58 of you watching this video will not be alive next week. And it’s not because of some freak accident or rare disease. It’s because of everyday actions you probably think are harmless. Let’s save your life today by looking at what is most likely to kill you next week – so you can avoid it.
NEW VIDEO: This Virus Saves Your Life – by Killing Billions
You’ve got trillions of viruses inside you – right now! But these aren’t the viruses you fear. Some of them are your body’s secret protectors, keeping deadly bacteria in check and even killing cancer cells. But what happens when they turn against you? Let's look at the wild world of the ...
Patreon Exclusive 1h Early Access: Limited Edition Pin
The New Limited Edition Pin is here! Coming to you straight from the Ducktopia Labs: The Determinator 3000.🤖 As a Patron, you can get it here, before everyone else🤖Are you tired of making your own decisions? We certainly are, sometimes.That’s why we developed the Determinator 3000. Power it ...
UPDATE #2: Why Losing Weight is so Difficult – The Workout Paradox Update
The updated version of The Workout Paradox video is now live: https://kgs.link/WorkoutUpdateAfter hearing your feedback on our initial video, we consulted experts, revised the script, and added more information to the parts that were too simplified. All changes and the link to the original video (no...
NEW VIDEO: Let’s do REAL Time Travel (with Physics)
Time travel is possible! In fact, you’ve been doing it since the day you were born. But what if we told you there’s a way to hack the universe and manipulate time itself? We just have to do two simple things to make it happen: 1. Make a lot of physicists grumpy. 2. Shoot one twin through space a...
NEW VIDEO: Fever is Amazing!
Fever feels bad. So we take medication to suppress it – but is this a good idea? It turns out fever is one of the oldest defenses against disease. What exactly is a fever? How does it make your immune defense stronger? Should you take a pill to combat it?
NEW VIDEO: A.I. – Humanity's Final Invention?
Humans rule Earth without competition. But we are about to create something that may change that: our last invention, the most powerful tool, weapon, or maybe even entity: Artificial Super intelligence. This sounds like science fiction, so let’s start at the beginning...
Patreon Exclusive 1h Early Access: Merch Drop
The new ✨LIMITED MERCH DROP✨ is your survival kit for the future!🌌 Get it here, before everyone else 🌌They say you can't prepare for the future, but we're proving them wrong!We've created a special survival kit for the future!It's packed with the essentials you'll need ...
UPDATE: Why Losing Weight is so Difficult – The Workout Paradox
UPDATE - 12. September:Dear birbs,The updated version of The Workout Paradox video is now live: https://kgs.link/WorkoutUpdateAfter hearing your feedback on our initial video, we consulted experts, revised the script, and added more information to the parts that were too simplified. All changes and ...
NEW VIDEO: Why Losing Weight Is So Difficult – The Workout Paradox
UPDATE - 12. September:The updated version of The Workout Paradox video is now live: https://kgs.link/WorkoutUpdateAfter hearing your feedback on our initial video, we consulted experts, revised the script, and added more information to the parts that were too simplified. All changes and the link to...
NEW VIDEO: This Disease is Deadlier Than The Plague
Did you know that one in four people globally is infected with tuberculosis, the deadliest infectious disease known to humanity?Mycobacterium tuberculosis is a master of evasion, often lying dormant and undetected in its host. It has already claimed the lives of over a billion people in the last two...
NEW VIDEO: Are You an NPC?
Are you free to make decisions? Or are you an NPC?You may thinkyou have free will and can choose what you do, but this might be an illusion: your body is made up of particles that blindly follow the laws of physics, with every outcome already predetermined. So,... you might not have any free will at...
Patreon Exclusive Early Access: Limited Edition Pin
The new ✨LIMITED EDITION PIN ✨ is hereand it represents the philosophy of kurzgesagt...🌌 Get it here, before everyone else 🌌We pre-made a batch of pins, especially for you, our Patreon birbs. 💖Be one of the first to order and receive your pin early! The pins will then be made to order a...
We’re Making a Video Game! 🚀
We've teamed up with Toukana Interactive, the creators of the indie-hit Dorfromantik for a new game, in space! Star Birds is coming to your Steam library in 2025 – and is available to wishlist now! ✨Embark on a journey across space, mine asteroids, and discover new technologies to advance e...
NEW VIDEO: The Easiest Way to Build a Black Hole
Black holes might create infinite universes while destroying time and space. Everything in existence could be black holes, all the way down. We might live inside a black hole that is inside a black hole, that is inside a black hole. But let’s start at the beginning and build a black hole out of ai...
Early Access and Exclusive Surprise Gift 💛
✨ Our new Curiosity Guideis finally here ✨It's more than just a book. It's an adventure to awaken your special superpower: Curiosity!We at the birb headquarters use this power every day and now, you can also learn to uncoverthe great mysteries of the world. Embark on exciting quests desi...
NEW VIDEO: Smoking is Awesome
We need to have an honest conversation about smoking:The problem with smoking is that it is way more than just a physical addiction.Smoking creates a temporary problem and offers an instant solution. Once your brain is used to nicotine, for up to 72 hours you are itchy, nervous, and stressed – but...
NEW VIDEO: There Are Thousands of Alien Empires in the Milky Way
We often assume that advanced technology will make it easy for aliens to colonize space. But what if space exploration is always difficult, no matter how advanced you are?Let’s travel back in human history, to the colonization of Oceania over 5000 years ago, to find parallels between ancient explo...
NEW VIDEO: The Real Killer of the Dinosaurs
The dinosaurs were wiped out by an Everest-sized asteroid that hit Earth, devastated the planet, and caused a mass extinction,… right?Well, new evidence suggests a second suspect: an ancient nightmare even older than the dinosaurs!Like the true crime channel we are, we're investigating one of ...
