Topic: human body

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What causes constipation?

Visiting the bathroom is part of the daily human experience. But occasionally, constipation, a condition that causes a backup in your digestive system, strikes. In some especially uncomfortable cases, the food you eat...

How Birds Get Oxygen Inside Their Eggs

"Look inside this incubator. These eggs were laid 21 days ago and this one is just about to hatch. If you listen you can hear the chick pecking at the inside of its shell. Soon it will break through and take its first...

What causes body odor?

Most of us don’t need more than one whiff to identify that generally unpleasant, characteristic smell we call body odor. But it’s a surprisingly complex phenomenon, influenced by our genetic makeup, age, diet, and hyg...

Building a prosthetic arm with parts from a LEGO Technic Air Race Jet

David Aguilar has built with LEGO since he was a kid. At nine years old, he built a prosthetic LEGO arm to augment his underdeveloped right arm, but the LEGO pieces weren't strong enough to meet the needs of his desig...

The Science of Skin

Between you and the rest of the world lies an interface that makes up 16% of your physical weight. This is your skin, the largest organ in your body: laid out flat, it would cover close to 1.7 square metres of ground....

A New Republic: The portrait work of artist Kehinde Wiley

Blending and contrasting contemporary clothes and objects with ornate fabrics, lush plant life, detailed patterns, and bold colors that reference earlier eras of art history, Kehinde Wiley's heroic portraits are large...

How does your immune system work?

The immune system is a vast network of cells, tissues, and organs that coordinate your body’s defenses against any threats to your health. Without it, you’d be exposed to billions of bacteria, viruses, and toxins that...

How your digestive system works

Across the planet, humans eat on average between 1 and 2.7 kilograms of food a day, and every last scrap makes its way through the digestive system. Comprised of ten organs covering nine meters, this is one of the mos...

How the Animal Kingdom Sleeps & How Animals See the World – Animalism

Sleep is universal in the animal kingdom, but each species slumbers in a different — and often mysterious — way. Some animals snooze with half their brain, while others only sleep for two hours a day (without even suf...

How does your body know you’re full?

Hunger claws at your belly. It tugs at your intestines, which begin to writhe, aching to be fed. Being hungry generates a powerful and often unpleasant physical sensation that’s almost impossible to ignore. After you’...

A LEGO lawn mower man endlessly cuts the grass

A LEGO man mows his LEGO lawn, endlessly pushing a LEGO lawn mower. This kinetic sculpture was created by Jason Allemann, aka JK Brickworks, and can be powered by hand crank or motor. The illusion of grass-cutting...

Fred Harwin hand paints highly detailed prosthetic eyes

Portland, Oregon-based ocularist Fred Harwin makes beautifully detailed artificial eyes, an occupation that requires both medical and illustrative expertise. In this video from Oregon Public Broadcasting, Harwin share...

What does the wheelchair symbol actually mean?

Some of the world’s most recognizable symbols exist to sell products. Others, to steer traffic or advance political causes. But there’s one whose main purpose is to help people. You may know it as the wheelchair symbo...

A Few Things to Know About American Sign Language

What might people who use American Sign Language (ASL) want people who don't use it to better understand? DT Bruno, Kallissa Bailey, Ardavan Guity, Leyland Lyken, and Felicia Williams answer that question in this vide...

You’re A Firework (Scientifically Speaking)

"You have more in common with a firework than you might think. The same process that powers those explosions is going on inside a grill when you cook a hot dog, and inside your body when you eat that hot dog." Sku...

How Ingenious Animals Have Engineered Air Conditioning

Termites, prairie dogs, and people are all great builders, each in their own way. We all share one crucial problem: Put a bunch of us in a closed space, breathing oxygen in, breathing CO2 out... it doesn't end well. ...

The giant tap dancing noses of Shostakovich’s ‘The Nose’

Giant tap dancing noses... an entire row of them! First performed in 1929, this fantastical troupe is from Dmitry Shostakovich's The Nose. The production above is by The Royal Opera from the autumn of 2016: Shostak...

MetaLimbs: Extra robot arms that you control with your feet

What if you were given two extra robot arms to use? Could you open a closed door when your hands are full? Could you paint or build something faster or more efficiently? Might you become a master juggler? This Inami H...

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