What Is Sickle Cell Disease?
Youth Biology
You have around 35 trillion red blood cells moving around your body at all times. Typically they are rounded and flexible. What happens when they aren’t?
Why Is Alzheimer's Disease So Difficult To Treat?
Youth Biology
While doctors have studied Alzheimer’s for decades, there is still no effective preventive treatment or cure. So, why is Alzheimer’s disease so difficult to treat?
Why is it so dangerous to step on a rusty nail? - Louise Thwaites
Adults Biology
Explore how a toxin-producing bacterium causes tetanus, and how to identify its common symptoms and best prevention practices.
This Disease is Deadlier Than The Plague
Adults Biology
The white death has haunted humanity like no other disease following us for thousands, maybe millions of years.
Why Does Hitting Your Funny Bone Feel...Funny?
Youth Biology
Explore the complex anatomy of the elbow, and find out why hitting your funny bone causes such an odd and painful sensation.
Why People Prefer More Pain
Adults Biology
We experimented to see how much pain our volunteers could handle.
7 Ways Humans Change Color
Adults Biology
We're all used to our bodies being more or less the color they always are.
The Four Spheres Part 1
Youth Biology
In this episode of Crash Course Kids, Sabrina talks about two of the four spheres that make up our planet; The Geosphere and the Biosphere.
Why Broken Hearts Hurt — and What Heals Them | Yoram Yovell | TED
Adults Biology
What's the relationship between physical and mental pain, and how can you ease both?
How Skin, Snot, and Cells Keep Us Healthy: Animal Defense Systems: Crash Course Biology #45
Adults Biology
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.
Can you transplant a head to another body?
Adults Biology
Follow a neurosurgeon's attempts to perform a head transplant, and dig into the ethical and biological questions the procedure raises.
You have no free will at all | Stanford professor Robert Sapolsky
Adults Biology
How your biology and environment make your decisions for you, according to Dr. Robert Sapolsky.
Ocean Wonders: Aging In The Abyss
Youth Biology
Join us as we take a look at what it’s like to grow old in the ocean.
Our Instruction Manual for Existing
Adults Biology
Your DNA contains all the instructions your body needs to function. In this episode of Crash Course Biology, we’ll figure out what this giant instruction manual looks like and how this three-billion-letter code gets copied into your trillions of cells through DNA replication.
Why Are All Humans Unique? Meiosis: Crash Course Biology
Adults Biology
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 a totally unique remix of your parents’ DNA.
Your Immune System
Kids Biology
Watch the video to learn how our immune system works and what are the three types of immunity that protect us each and every day.
Why Do We Get Goosebumps?
Youth Biology
We've all been there when it gets a bit chilly and you end up with goosebumps. But have you ever wondered why and how we get them?