Be Smart
The Great Oxygenation
New ReviewLife’s been around on Earth for at least 3.7 billion years. But for most of that time, it was incredibly boring — just simple little cells squirming around in water. It only got interesting in the last few hundred million years. And that...
Be Smart
How Scorpions Became Earth’s Ultimate Survivors
New ReviewScorpions are a frightening and deadly group of animals. But their venom is one of nature's most unique chemical cocktails. Here’s how scientists are using it for inspiration to design new medicines and pain killers.
Be Smart
Why Are Blood Types a Thing?
New ReviewAcross life on Earth, blood comes in red, blue, green, purple, even clear. But why? And what makes your blood different from mine? This video will teach you everything you need to know about the strange world of blood—what it does, why...
Be Smart
Is this Chicken?
New ReviewOur appetite for meat is one of the greatest environmental challenges we face. Join me on a mind-blowing visit to UPSIDE Foods, the world's most advanced cultivated meat production facility, as we ask whether cultivated meat can deliver...
Amoeba Sisters
Action Potential
New ReviewJoin the Amoeba Sisters as they explore the action potential. This video discusses resting membrane potential before going into the phases of the action potential including vocabulary such as depolarization, repolarization, and...
SciShow
The End of Lab Rats
We've been using lab rats for over a hundred years, and they've been part of some of the biggest medical breakthroughs ever. But what comes next? From organs on a chip to computer simulations, here are some of the ways that science might...
SciShow
Why We Need Camels To Treat Cancer
In the fight against diseases like cancers and blood disorders, sometimes we need to turn to unexpected allies. And in this case, one of those allies was a tiny little nanobody hiding inside of... camels. Hosted by: Savannah Geary...
SciShow
Is Pregnancy Carcinogenic?
Does childbirth increase your chance of breast cancer? Yes. But it also decreases it in the longterm ...depending on how old you are your first time around. It has to do with your hormones like estrogen and the damaged DNA in your cells....
SciShow
How Not Sleeping Actually Kills You
Who among us hasn't uttered the phrase "I'll sleep when I'm dead"? Well, sleep deprivation can totally kill you. But you might be surprised to learn what the actual cause of death is, and a technique you can use to stay awake for the...
SciShow
Why We've Only Cured HIV Seven Times
As of 2024, exactly seven people have been cured of HIV, most recently the "next Berlin patient." Why aren't we sharing this cure with everyone living with HIV? It's complicated. Hosted by: Reid Reimers (he/him)
SciShow
This New Drug Makes the Flu Less Deadly
Seasonal flu kills half a million people every year. But scientists may have found a drug that, while it won't stop you from getting the flu, could stop it from killing you. Hosted by: Hank Green (he/him)
SciShow
Trees Are All Dead Inside (And That's a Problem)
Trees are dead inside. It's true: the xylem tissue that supports their trunks technically isn't alive. Archaeologists hate that because this problem, the old wood problem, can cause carbon dating to be off by hundreds of years. Hosted...
SciShow
Recognizing Faces, Even When You Can't See Them
Blind people use the same part of their brains to recognize faces as sighted people, and can even identify a face from the sound of someone chewing. Hosted by: Reid Reimers (he/him)
SciShow
Why Elephants Rarely Get Cancer
One fun fact about elephants is that they're a lot less likely to get cancer than other animals (including us). Another fun fact is that unlike most warm-blooded animals, their testes are deep inside their bodies. It turns out, these two...
SciShow
Sometimes…Jellyfish Live on Land
Myxozoans are so weird. They're jellyfish the size of single-celled organisms. Some of them even live on land. New weirdest animal just dropped. Hosted by: Savannah Geary (they/them)
Crash Course
Biology and You: The Dr. Sammy Show: Crash Course Biology #50
Biology connects all of life—all of YOUR life. In the final episode of Crash Course Biology, Dr. Sammy is taking your questions. No matter how big, small, or personal, biology is in them all! He’ll show us how biology can help us solve...
Crash Course
Sexual & Asexual Reproduction: How Animals Do It: Crash Course Biology #47
When it comes to animal reproduction, there’s no one-size-fits-all strategy. Some animals need a mate, others don’t, and for some, it depends! In this episode, we’ll learn about sexual and asexual reproduction, internal and external...
Crash Course
Animal Defense Systems: How Skin, Snot, and Cells Keep Us Healthy: Crash Course Biology #45
The world is full of microbes and viruses that can get us sick, but we’ve got an Avengers-style defense system ready to take them on. In this episode of Crash Course Biology, we’ll learn about an animal’s immune system, from their skin...
Crash Course
Viruses & Vaccines: How Do Vaccines Work?: Crash Course Biology 39
From the flu to COVID-19, viruses are a major threat in our everyday lives. In today’s episode of Crash Course Biology, we’ll learn why viruses are like genes in a box, and how they invade and spread between cells. We’ll also discover...
Crash Course
Genetic Mutations: Is Drinking Milk a Super Power?: Crash Course Biology #37
Science fiction is full of superpowered mutants, but in reality, mutations are much more diverse and complex. Sometimes, they can change someone’s entire body, and other times, we don’t notice them at all! In this episode, we’ll unpack...
Crash Course
Translation: How RNA Gets Translated into Protein Power: Crash Course Biology #35
How does the information from mRNA turn into a protein? It all comes down to translation, where nucleotides are translated into a chain of amino acids. In this episode of Crash Course Biology, we’ll cover codon-reading ribosomes, tRNA...
Crash Course
Meiosis: Why Are All Humans Unique?: Crash Course Biology #30
Ever wonder why we aren’t exact clones of our parents, or why siblings aren’t exactly alike? The reason traces back to meiosis. In this episode of Crash Course Biology, we’ll discover how egg and sperm cells get made and learn why you’re...
Crash Course
Mitosis & the Cell Cycle: How Cells Clone Themselves: Crash Course Biology #29
What’s the life of a cell like? In this episode of Crash Course Biology, we’ll follow a cell’s life cycle, from its beginning as a shiny new cell all the way to division via mitosis. We’ll learn how our cells control this process, and...
Crash Course
Photosynthesis: The Original Solar Power: Crash Course Biology #28
Photosynthesis is a powerful process that is responsible for some of life’s most vital functions. In fact, consumers like us rely on photosynthetic producers to harness energy from the sun so that we can survive and thrive. In this...