Kurzgesagt - In a Nutshell: 2025
Season 13 Lore Primer
Key plot threads, lore context, and character stakes you need to remember before diving into this season.
- Directly follows the overarching narrative developments of Kurzgesagt - In a Nutshell Season 12.
- Faction dynamics and core character alliances shift under escalating external stakes.
- Crucial mysteries introduced previously reach key turning points and narrative reckonings.
- Sets up serialized story arcs that build directly toward the climactic season finale.
Episode Guide
Season 13 Progress Shield
Alien Whales On Planet Nimbus - What Aliens Might Look Like
Feb 4, 2025 · 16 min
Humans assume aliens look human. But why would they? Let's explore what life might actually look like in strange, distant worlds.
This Is NOT An Anti Meat Video
Feb 25, 2025 · 15 min
Most of us love animals but also eat meat. Unfortunately, most animals we eat live in truly horrible conditions. We don’t torture them for better meat, just for cheaper meat. If we
Why Your Brain Blinds You For 2 Hours Every Day
Mar 18, 2025 · 13 min
Reality is not real. Your world is a prediction. Every sight, sound, and touch you experience is the result of calculations your brain makes before reality even reaches you. It fil
SOUTH KOREA IS OVER
Apr 2, 2025 · 15 min
South Korea is heading toward a demographic collapse unlike anything the world has seen before. With the lowest fertility rate ever recorded and a rapidly aging population, the cou
Your Time Machine Broke - At The Worst Time In History
Apr 22, 2025 · 12 min
What happens when your time machine breaks and you end up stranded millions of years ago? You’ve landed in a world that’s nothing like today, facing deadly storms and unbearable he
We Finally Answered the MOST Important Question
May 6, 2025 · 11 min
Can jellyfish power Tokyo? What would happen if it rained bananas for a day? We're taking two of your most absurd (and brilliant) questions and answer them with real science.
Why Does Fentanyl Feel So Good?
May 20, 2025 · 15 min
Fentanyl is the deadliest illegal drug in US history by far. It’s often described as the ultimate high, but it’s actually an inferior, short-lived, and brutally addictive version o
Why Is The US Dropping Billions Of Mutant Flies From The Sky?
Jun 3, 2025 · 11 min
A war has been raging for decades in the jungles of Panama, as we fight one of the most terrifying parasites on Earth. It is so relentless that our best defense is to drop 100 mill
The Betrayal of Autoimmune Diseases
Jul 1, 2025 · 11 min
What happens when the immune system meant to protect you becomes your worst enemy? This is the betrayal of autoimmune diseases like Type 1 diabetes, multiple sclerosis, celiac dise
Let's Kill You a Billion Times to Make You Immortal
Jul 29, 2025 · 13 min
No matter how likely your death is, there will always be a version of you that survives. At least according to one of the most bizarre interpretations of quantum mechanics, known a
Alcohol is AMAZING
Aug 12, 2025 · 15 min
Alcohol kills more people each year than wars, terrorism, homicides, and car accidents combined. It destroys bodies, relationships, and lives. Yet we toast with it at weddings, sip
The Drug That Works TOO Well?
Aug 19, 2025 · 12 min
From study sessions to dance floors, amphetamines can feel like a shortcut to superhuman focus and energy. Why do they work so well? What happens to your body once you take them? A
The Dumbest Animal Alive
Sep 2, 2025 · 11 min
The ocean sunfish, or Mola, is one of the strangest animals alive. A massive, flat, derpy giant that eats jellyfish, drifts aimlessly, and carries parasites that even have smaller
Can Humanity Stop A Planet-Killing Asteroid?
Sep 16, 2025 · 12 min
Some killer asteroids were found only days before flyby. If they had struck Earth, the power of thousands of nuclear bombs would have flattened cities and killed millions. What if
Pregnancy is Insane
Sep 23, 2025 · 13 min
Pregnancy is not gentle. Babies begin as invaders, growing a brand-new organ inside another human. For months, they sap energy, hack the immune system, and fight for survival. Out
We Found a Loophole to Survive the End of the Universe
Sep 30, 2025 · 13 min
Can we survive the heat death of the universe? One day, the last star will die, galaxies will dissolve, and black holes will evaporate. The universe becomes a cold, empty void wher
AI Slop Is Killing Our Channel
Oct 7, 2025 · 12 min
AI-generated content is flooding the internet, from videos and music to news and books. On top of that, generative AI is making false information look more convincing than ever. W
You Need To Quit Weed.
Oct 14, 2025 · 14 min
Weed is often seen as harmless, and in some cases, even helpful. But for many people, it can slowly become a serious problem, especially as they approach their twenties or thirties
You're More Stressed Than Ever - Let's Change That
Nov 11, 2025 · 12 min
Stress is a biological superpower that helped your ancestors outrun predators, fight off enemies, and survive extreme situations. In the past, it helped us survive, but today, it’s
Let's Talk About Fat
Nov 18, 2025 · 12 min
Fat is not just stored energy, it’s a complex organ that controls crucial hormones and communicates with your brain, immune system, and metabolism. It's one of the most powerful or
Trees Are So Weird
Nov 25, 2025 · 13 min
Trees are among the most extreme and successful forms of life on Earth. They build their bodies from thin air, move water with pressures that would crush a human, and grow using a
Astronomy Is In Crisis...And It's Incredibly Exciting
Dec 2, 2025 · 12 min
Our best theory of the universe might be breaking apart! The new data we're receiving from space telescopes is creating more and more cracks in our current understanding of the uni
All Of Human History In One Hour
Dec 5, 2025 · 64 min
Modern humans have been around for around 200,000 years. With Earth being 4.5 billion years old, this might seem like only a small speck of time, yet our story is long, rich, and f
Tattoo Removal Is Insane
Dec 12, 2025 · 13 min
Getting a tattoo itself might be a dramatic event for your immune system, but things get even crazier when you try to remove them! From intense lasers, to shockwaves and exploding