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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?

Do Gut Microbes Control Your Personality? | Kathleen McAuliffe | TED

Adults Biology
Biologist Kathleen McAuliffe dives into new research that suggests certain bacteria in your gut can influence major parts of who you are, from your personality to life-changing neurological disorders.

Intro To Nutrition

Youth Biology
The goal for today's lesson is to explain the role of nutrition in leading a healthy lifestyle.

Can you trust your memory? This neuroscientist isn’t so sure | André Fenton

Adults Biology
There are three kinds of memory that all work together to shape your reality. Neuroscientist André Fenton explains.

A Tour of the Cell: Crash Course Biology #23

Adults Biology
The cell is the basic unit of life, and our understanding of it has advanced as science, and the tools available to scientists, has advanced.

You Are Your Microbes

Youth Biology
Jessica Green and Karen Guillemin emphasize the importance of understanding the many organisms that make up each and every organism.

A Lot About Axolotls

Youth Biology
Join Jessi and Squeaks as they learn about why axolotls have feathery gills and live in water, and how to protect their natural habitat.

CRISPR's Next Advance Is Bigger Than You Think

Adults Biology
You've probably heard of CRISPR, the revolutionary technology that allows us to edit the DNA in living organisms.

Why Do We Have Bones?

Youth Biology
Why do we have skeletons inside of us, and what even are bones?

Sense-Abilities | Weird But True!

Kids Biology
Watch the full episode of Weird But True, Season 1 Episode 11, "Sense-Abilities"! Did you know that when you smell something, molecules of whatever you’re smelling are actually entering your nose?!

Why Can't I Grow More Teeth?

Adults Biology
How come sharks get to have endlessly regrowing teeth when humans only get one set our entire lives? And how come some other mammals get to cheat the system? From elephants to baboons, we'll learn why teeth don't grow back.

The #1 way to strengthen your mind is to use your body | Wendy Suzuki

Adults Biology
Exercise gives your brain a “bubble bath of neurochemicals,” says Wendy Suzuki, a professor of neural science.

Blindness Isn't a Tragic Binary — It's a Rich Spectrum | Andrew Leland | TED

Adults Biology
When does vision loss become blindness? Writer, audio producer and editor Andrew Leland explains how his gradual loss of vision revealed a paradoxical truth about blindness -- and shows why it might have implications for how all of us see the world.

The Reason Why Cancer is so Hard to Beat

Adults Biology
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.

Neuroscientist debunks ‘lizard brain’ myth | Lisa Feldman Barrett

Adults Biology
Plato famously described the human psyche as two horses and a charioteer: One horse represented instincts, the other represented emotions, and the charioteer was the rational mind that controlled them.

What Biologists Do: Crash Course Biology

Adults Biology
A biologist’s natural habitat is anywhere questions about life are being asked—whether the subject is a nematode or a narwhal, a single cell, or a whole ecosystem.

The science of super longevity | Dr. Morgan Levine

Adults Biology
Science can’t stop aging, but it may be able to slow our epigenetic clocks.

Your Body Killed Cancer 5 Minutes Ago

Adults Biology
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 Guts

Youth Biology
Today, we will learn about how your gut works through a rather gross science experiment.