Topic: body

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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.

How do animals see in the dark?

How do animals see in the dark... and sometimes in color? Learn more about the night vision of the tarsier, cats, toads, and hawkmoths in this illuminating animation from TED Ed. Learn more about eyes in these videos.

DuoSkin: Functional, stylish on-skin user interfaces

Wear your game controller on your arm in the future and much more. From MIT Media Lab in collaboration with Microsoft Research, PhD student Cindy Hsin-Liu Kao introduces DuoSkin: Functional, stylish on-skin user inter...

A 3D printed ‘wheel-of-light’ zoetrope that walks and dances

When this 3D printed, bent-looking mesh cylinder is spun and lit with a band of bright light from the side, a walking person is revealed. This is toki, a modern zoetrope was created by media artist Akinori Goto. A dan...

How Old Is Your Body, Really?

Have you ever heard the statement that the cells in your body are completely replaced every seven years? Is this true? In this beautifully illustrated episode of Skunk Bear, NPR's Adam Cole explores how long our diffe...

The Blind Astronomer of Nova Scotia

Tim Doucette is legally blind, yet he sees the stars better than most people. A childhood diagnosis of congenital cataracts forced doctors to remove Doucette's lenses and widen his pupils. That left the amateur astron...

Why do some people have seasonal allergies?

If you've ever experienced watery eyes, sneezing, runny nose, itchy throat, and other allergic reactions during springtime, or you haven't but you know someone who has, this beautifully animated TED Ed by Eleanor Nels...

Opera singers sing during real-time MRI scans

Thanks to a team of researchers at the Freiburger Institute for Musician's Medicine, we get to watch this real-time MRI scan of baritone Michael Volle as he sings O Du, mein holder Abendstern (Oh thou, my fair evening...

Born with no fingers, teen Alexey Romanov is a piano prodigy

At 16 years old, Alexey Romanov has become a celebrated pianist across Russia. Born with no fingers, his growing love for classical music motivated him to start learning piano. In two years of diligent practice, Roman...

How do eyes work & how do glasses help us see?

Glass, water, and the eye are three different transparent mediums that change the direction of light, a phenomenon called refraction. Refraction in the eye helps us see by bending light into an accurately focused poin...

The Science of Skin Color – TED Ed

When ultraviolet sunlight hits our skin, it affects each of us differently. Depending on skin color, it’ll take only minutes of exposure to turn one person beetroot-pink, while another requires hours to experience the...

Evidence of evolution that you can find on your body

Signs of our evolutionary history can be found in the form of vestigial structures on the human body. Watch this Vox video to help identify the evidence of evolution in yours. Some background via Wikipedia: Vestig...

Stanford’s µTug microrobots can pull a car

Watch six of Stanford's µTug (MicroTug) robots pulling an unmodified 3,900lb (1,800kg) car thanks to special directional adhesive "shoes" and "a very long, very slow, but very steady winching gate." The six microTugs ...

A titanosaur in 360° VR with Sir David Attenborough

From the BBC's Attenborough and the Giant Dinosaur, this is a 360 degree virtual reality introduction to the 70-ton dinosaur known as a titanosaur. Grab a smartphone headset, or view it on your phone or desktop. S...

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