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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.

What Is Earwax?

Youth Biology
Explore why earwax forms, its purpose in our health, and whether or not we should be trying to get rid of it.

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.

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.

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.