The WORST episodes of Kurzgesagt – In a Nutshell
Every episode of Kurzgesagt – In a Nutshell ever, ranked from worst to best by thousands of votes from fans of the show. The worst episodes of Kurzgesagt – In a Nutshell!
Kurzgesagt (German for «in a nutshell») is a Munich-based design studio, with a distinctive perspective on design and animation within the fields of education, science and commerce. Founded in 2012 by Philipp Dettmer & Stephan Rether, the studio engages in information design projects of all kinds. We love science, minimalism, colors and music. But most of all combining them to tell stories.
#1 - How We Make Money on YouTube with 20M Subs
Season 2023 - Episode 3 - Aired 3/28/2023
In 2023, Kurzgesagt has existed for 10 years (which is insanely long in internet years). We are among the largest sciencey channels on Youtube and still a bit of a black box to people. So let us talk about ourselves in three parts: Our backstory, how we finance our work, and the values of Kurzgesagt!
#2 - The Last Human – A Glimpse Into The Far Future
Season 2022 - Episode 7 - Aired 6/28/2022
The future of humanity seems insecure. Rapid climate change, political division, our greed and failings make it hard to look at our species with a lot of optimism and so many people think our end is in sight. But humans always thought they lived in the end times. Every generation assumes they’re important enough to witness the apocalypse and then life just goes on. This is a problem because it leads to short term thinking and prevents us from creating the best world for ourselves and our descendants. What makes this worse is that we actually may live at an extremely critical moment in human history. To understand why, let us look at the temporal window of humanity and ask: When will the last human be born and how many people will there ever be?
#3 - The Deadliest Virus on Earth
Season 2022 - Episode 8 - Aired 7/26/2022
In the 1970s thousands of Chickenheads rained from the sky in Europe, making foxes and other wildlife confused and very happy. Why? They were filled with a vaccine to fight the deadliest virus known to humanity – since the 1930s a rabies epidemic had been sweeping across wildlife populations in Europe and humans wanted to finally get rid of the virus once and for all. Rabies is named after Lyssa, the ancient Greek spirit of mad rage, and has been haunting us for at least 4000 years. It can turn animals into angry beasts and humans into zombies that fear water. But what makes Lyssa fascinating is not just how bizarre and deadly its infection is, but also how incredibly good it is at avoiding our defenses.
#4 - Is Civilization on the Brink of Collapse?
Season 2022 - Episode 9 - Aired 8/16/2022
At its height, the Roman Empire was home to about 30 % of the world’s population, and in many ways the pinnacle of human advancement. Rome became the first city in history to reach one million inhabitants and was a center of technological, legal, and economic progress. An empire impossible to topple, stable and rich and powerful. Until it wasn’t anymore. First slowly then suddenly, the most powerful civilization on earth collapsed. If this is how it has been over the ages, what about us today? Will we lose our industrial technology, and with that our greatest achievements, from one dollar pizza to smartphones or laser eye surgery? Will all this go away too?
#5 - How To Make Friends
Season 2022 - Episode 10 - Aired 9/6/2022
Friends make life good. They provide the scaffolding that makes it not just bearable but fun. They give us a sense of meaning and purpose and are a source of security, self esteem and happiness. Almost nothing predicts how happy you will be as how connected you feel and a lack of social connection is associated with a number of diseases and a shorter life. But maybe you have scrolled through your phone, unsure who to call to go to a movie with, to celebrate with or ask for comfort. You may realize that you don’t have enough friends and feel lonely. And it is not just you. Disconnectedness and loneliness are widespread. Many people want more close friends but don’t know how to get them.
#6 - Let’s Travel to The Most Extreme Place in The Universe
Season 2022 - Episode 11 - Aired 10/4/2022
The universe is pretty big and very strange. Hundreds of billions of galaxies with sextillions of stars and planets and in the middle of it all there is earth, with you and us. But as enormous as the universe seems looking up, it seems to get even larger when you start looking down. You are towering over worlds within worlds, within worlds – each in plain sight and yet hidden from your experience. Let’s go on a journey – we’ll start in a park, about a thousand meters long, enough for a 15 minute walk. Every time we click a magic button, we’ll become a thousand times smaller. Ready? Let’s go.
#7 - The Biggest Eruptions That Changed Earth Forever
Season 2022 - Episode 12 - Aired 10/18/2022
The Earth is a gigantic ball of semi-molten rock, with a heart of iron as hot as the surface of the Sun. Titanic amounts of heat left over from its birth and the radioactive decay of trillions of tons of radioactive elements find no escape but up. Currents of rock spanning thousands of kilometers carry this energy to the surface. Earth’s crust is the only thing in their way. It feels solid to us, but it is only a fragile barrier, an apple skin around a flaming behemoth. True apocalypses can break through and unleash eruptions tens of times more powerful than all of our nuclear weapons combined, subjecting the climate to centuries worth of change in a single year, while drowning continents in toxic ash and gases: supervolcanoes. How big can they get? And will they put an end to humanity?
#8 - Why Don't We Shoot Nuclear Waste Into Space?
Season 2022 - Episode 13 - Aired 11/8/2022
Here in the Kurzgesagt labs we test very important ideas to see what happens when you blow things up or play with black holes. Many of you suggested that we look into an idea that sounds reasonable: Shooting nuclear waste into space. It is one of those concepts that seems like an easy fix for one of the main problems with nuclear energy. But it turns out this idea is not just bad but horribly bad and it gets worse the longer you think about it.
#9 - The Most Extreme Explosion in the Universe
Season 2022 - Episode 14 - Aired 11/23/2022
Supernovae are the most powerful explosions in the universe, unleashing enough energy to outshine galaxies. We have no real metaphor for their power – if the sun were to magically go supernova it would feel like you were being hit by the energy of a nuclear explosion, every second. For weeks. While supernovae are the engines of creation, forging the elements that enable life, they also burn sterile whole regions of galaxies. So what would happen if one hit earth?
#10 - The Horror of the Slaver Ant
Season 2022 - Episode 15 - Aired 12/6/2022
Everything changed when the slaver nation attacked. What used to be a thriving colony is now a captured country. Slaves do the work, serving their new masters until they die, only to be replaced by new victims harvested in brutal raids. But let us go back to the beginning…
#11 - How To Terraform Mars - WITH LASERS
Season 2022 - Episode 16 - Aired 12/11/2022
Mars is a disappointing hellhole lacking practically everything we need to stay alive. It looks like we’ll only ever have small crews spend a miserable time hidden underground. Except, we could terraform it into a green new world. But to solve the planet’s problems, we first need to make it worse and turn it into oceans of lava with gigantic lasers.
#12 - Black Hole Star – The Star That Shouldn't Exist
Season 2022 - Episode 17 - Aired 12/15/2022
Black hole stars may have been the largest stars to ever exist. They burned brighter than galaxies and were Larger than any star today or that could ever exist in the future. But besides their scale, what makes them special and weird is that deep inside, they were occupied by a cosmic parasite, an endlessly hungry black hole. How is that even possible?
#13 - The Most Complex Language in the World
Season 2023 - Episode 1 - Aired 2/14/2023
You are cells. Your muscles, organs, skin and hair. They are in your blood and in your bones. Cells are biological robots. They don’t want anything, they don’t feel anything. They are never sad or happy. They just are, right here, right now. They are as conscious as a stone or a chair or a neutron star. Cells just follow their programming that has been evolving and changing for billions of years, molded by natural selection. They are impossible machines and yet, here they are, driven entirely by the fundamental forces of the universe. The smallest unit of life, right at the border where physics becomes biology. Sometimes, to get a truer understanding of how amazing something is, you need to hold your breath and dive in really deep. So, what are cells and how do they work?
#14 - Our Minds Are Weirder than You Think
Season 2026 - Episode 5 - Aired 4/21/2026
Your mind is the only place in the universe that only you can access. It’s where all of your thoughts, memories and emotions exist. A whole inner universe that is being shaped by your biology, experiences and imagination. It's what makes you: you. There is a wide spectrum of minds in nature, however humans have taken theirs to another level. Our minds can reflect on themselves, simulate other perspectives, and even construct entire fictional worlds. What exactly is a mind? How and why did it evolve, and could it be the most secret place in the universe?
#15 - What Actually Happens When You Are Sick?
Season 2023 - Episode 2 - Aired 2/28/2023
There is this idea floating around that what doesn’t kill you, makes you stronger. That surviving a disease leaves you better off. And it seems to make sense because we have all experienced this. When you go through hardship, often you come out more resilient, more ready to face a difficult situation in the future. But it turns out that sometimes, what doesn’t kill you makes you weaker. So, what happens when you get sick?
#16 - Change Your Life - One Tiny Step at a Time
Season 2022 - Episode 6 - Aired 6/7/2022
If you are like most people, there is a gap between the person you are and the person you wish to be. There are little things you think you should do and big things you ought to achieve. From working out regularly, eating healthy, learning a language, working on your novel, reading more or simply actually doing your hobby instead of browsing reddit. But it can seem that to achieve your goals, you have to become a different person. Someone who is consistent, puts in more effort, has discipline and willpower. Maybe you have tried your hardest to be like that. And it worked! For a while. Until you find yourself slipping back into your old ways. In the end, you always seem to fail. And with every failed attempt, you become more and more frustrated and annoyed with yourself. If you believe “success and hustle” internet, it is all your own fault: if you don't succeed, you just didn’t want it enough and the failure is all you. But change is actually hard. But as with most things...
#17 - Why Aliens Might Already Be On Their Way To Us
Season 2023 - Episode 4 - Aired 4/11/2023
The universe is magnificent and vast. Hundreds of billions of galaxies, trillions of stars, and even more planets. If even the tiniest fraction are habitable, then the Universe should be teeming with life. And yet we see nothing, only vast emptiness. Where is everyone else? The answer to this riddle could be as exciting as it is creepy: we are early, born before almost all other life – but very soon this may change. Not only might aliens appear, they could quickly surround us. An irreversible competition for the universe might be about to begin.
#18 - Your Body Killed Cancer 5 Minutes Ago
Season 2023 - Episode 5 - Aired 5/9/2023
Somewhere in your body, your immune system just quietly killed one of your own cells, stopping it from becoming cancer, and saving your life. It does that all the time. The vast majority of cancer cells you develop will be killed without you ever noticing. Which is an incredibly hard job because of what cancer cells are: parts of yourself that start to behave as individuals even if it hurts you. What is cancer and how does your body kill it all the time?
#19 - The Black Hole That Kills Galaxies
Season 2023 - Episode 6 - Aired 6/11/2023
The universe isn't just a vast empty ocean sprinkled with galaxies – most of the atoms are actually drifting in between, in the intergalactic medium. If we look closely, we can see who is in charge here: Quasars, the single most powerful objects in existence. As small as a grain of sand compared to the amazon river, they reside in the centers of some galaxies, shining with the power of a trillion stars, blasting out huge jets of matter, completely reshaping the cosmos around them. They are so powerful that they can kill a galaxy. What are they, and how do they mold the structure of the universe at their whim?
#20 - The Reason Why Cancer is so Hard to Beat
Season 2023 - Episode 7 - Aired 6/18/2023
An undead city under siege, soldiers and police ruthlessly shooting down waves of zombies that flood from infected streets, trying to escape and infect more cities. This is what happens when your body fights cancer, more exciting than any movie. How does this battle for survival unfold?
#21 - The Most Dangerous Weapon Is Not Nuclear
Season 2023 - Episode 8 - Aired 7/2/2023
A breathtaking scientific revolution is taking place – biotechnology has been progressing at stunning speed, giving us the tools to eventually gain control over biology. On the one hand solving the deadliest diseases while also creating viruses more dangerous than nuclear bombs, able to devastate humanity. What is going on?
#22 - The (Second) Deadliest Virus
Season 2023 - Episode 9 - Aired 8/8/2023
Few of the monsters that evolution created have been so successful at hurting us as the variola virus, responsible for smallpox. The carnage it caused was so terrible and merciless that it compelled humankind, for the first time, to act truly globally. It was one of the greatest wins of our species over the ancient powers of nature, all made possible by… cows.
#23 - What Happens If You Destroy A Black Hole?
Season 2023 - Episode 10 - Aired 8/16/2023
Black holes can destroy everything – but can they be destroyed? What happens if we push physics to the absolute limits, maybe even break it and the universe in the process? Let’s create a tiny black hole, about the mass of our moon, in the Kurzgesagt Labs and try to rip it apart.
#24 - How A Nuclear War Will Start - Minute by Minute
Season 2023 - Episode 11 - Aired 8/22/2023
Mr. President! Nuclear missiles will strike our country in 14 minutes. I know it’s your first day in office so I’m going to walk you through it, but you’re the only one who can authorize our nuclear retaliation in response and you’ve only got a few minutes to make a decision!
#25 - Are You A Dream Of The Universe?
Season 2023 - Episode 12 - Aired 9/12/2023
Absolutely everything you think about yourself and the universe could be an illusion. As far as you know, you are real and exist in a universe that was born 14 billion years ago and that gave rise to galaxies, stars, the Earth, and finally you. Except, maybe not.