Topic: body

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The three different ways mammals give birth

All mammals share certain characteristics, like warm blood and backbones. But despite their similarities, these creatures also have many biological differences — and one of the most remarkable differences is how they ...

Why peregrine falcons are the fastest animals on earth

Peregrine falcons are the fastest animals of the land—and it's no wonder, their bodies are built for speed. While cheetahs can run up to 70 mph on land, peregrine falcons can dive at speed of over 200 mph. That's fast...

Oxygen’s surprisingly complex journey through your body

Oxygen forms about 21% of the air around us. In your body, oxygen forms a vital role in the production of energy in most cells. But if gases can only efficiently diffuse across tiny distances, how does oxygen reach th...

Octopus, elephant, & human arm robot assistants from Festo

Inspired by an octopus tentacle, this OctopusGripper bionic arm can grab and hold a variety of round objects, both taking and passing it back to a human counterpart. It was designed and built by Festo's Bionic Learnin...

How the food you eat affects your gut – TED Ed

The bacteria in our guts can break down food the body can’t digest, produce important nutrients, regulate the immune system, and protect against harmful germs. And while we can’t control all the factors that go into m...

How to practice effectively…for just about anything

Mastering any physical skill takes practice. Practice is the repetition of an action with the goal of improvement, and it helps us perform with more ease, speed, and confidence. But what does practice actually do to m...

Why Does Your Cat’s Tongue Feel Like Sandpaper?

If you've ever been licked by a cat, did their tongue feel scratchy like sandpaper? The scratchiness is caused by their keratin papillae, tiny claw-like spines on their tongue that help to clean their fur. Cats (Felis...

An up close look at fingerprints and sweat glands

Zoom in to see this fingertip's epidermal ridges, those tiny lines, whorls, loops, arches, and valleys that are unique to each person on the planet. This macro and time lapse footage, filmed by Time Lapse Vision, an i...

The Ground Beneath Me: A photo every day for one year

I have feet. Sometimes they take me to far away places and sometimes they never leave my apartment. I took a photo of them and the ground beneath that lies beneath them every day from January 1st 2016 to December 31st...

The World’s First Poo Museum

How might you preserve scat -- an animal's fecal dropping, poo, or poop -- for the world's first poo museum? ...or pooseum? In this BBC Earth Unplugged episode, Maddie Moate visits with Daniel Roberts, co-founder ...

How high can you count on your fingers?

How high can you count on your fingers? It seems like a question with an obvious answer. After all, most of us have ten fingers -- or to be more precise, eight fingers and two thumbs. This gives us a total of ten digi...

Crafting Cell Diagrams

Create your own cells with science enthusiast and STEM education advocate Ella K. Chan. In 2013, at the age of 12, she began sharing science activities for kids on her Sci Files YouTube channel. In this activity, she ...

You Can’t See This (Mind Tricks)

Our brains and eyes aren't always showing us everything that's available to see. Instead, learning, memory, and expectation changes our vision to fit as much as we can comprehend in any given moment. In this AsapScien...

Toothpaste – Ingredients With George Zaidan

Cultures throughout history have tried a variety of things to clean their teeth... Egyptians and Babylonians brushed with twigs around 3500-3000 BC. In 5000 BC, a recipe of ox hooves, eggshells, myrrh, and pumice woul...

The Chemistry of Skunk Spray

Skunks are infamous for their awful-smelling odor, but they don't always smell that way. Their spray, a liquid full of stinky chemicals from their anal scent glands, is used strategically to chase away predators. In t...

What causes cavities?

When a team of archeologists recently came across some 15,000-year-old human remains, they made an interesting discovery: the teeth of those ancient humans were riddled with holes. So what causes cavities, and how can...

3D printing ‘hyperelastic bone’ to mend injuries

Hyperelastic bone may be a 3D-printed solution for helping to mend our bones in the future. Cost-effective and customizable, the material is both a "structural element and a scaffold for bone regeneration," as shown i...

What Really Causes Sunburns?

Why does your skin turn red and peel when you get a sunburn? In this episode of Gross Science, Anna Rothschild explains what's going on in our skin when it burns from sun exposure.

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