Topic: how things work

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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 Remarkable Way We Eat Pizza – Numberphile

You may never look at a pizza or an orange in the same way again. Watch as astronomer, author, and teacher Cliff Stoll explains the Theorema Egregium or the Remarkable Theorem in this Numberphile vid. More via Aatish ...

‘Electric Wind’ Can Strip Earth-like Planets of Oceans, Atmospheres

'Electric wind' on Venus may have stripped the planet's upper atmosphere of oxygen... and it "may have played a significant role in stripping Earth's twin planet of its oceans, according to new research results from t...

I, Octopus – Science Friday

With thousands of chemically-sensitive suckers, color-changing skin, and a brain that literally stretches when they eat, octopuses seem like aliens living in our oceans. Understanding their physical adaptations and ho...

What’s the Waggle Dance? And Why Do Honeybees Do It?

How do bees tell each other where the best flowers are? Behold the waggle dance, the wonderful way that bees communicate their instructions for finding those productive flowers again. Using vibrations, her positioning...

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...

A Guide To Spelling by this year’s youngest Spelling Bee competitor

The youngest contestant to participate in this year's National Spelling Bee was Akash Vukoti, a 6 year old Texan who made it to round 3 of the competition. In this video from Vox, Vukoti explains what contestants are ...

Rock-Paper-Scissors Lizards

Biologists from UC Santa Cruz are studying the three distinct mating strategies of what's being referred to as "rock-paper-scissors lizards," the blue, orange, and yellow variations of the Western side-blotched lizard...

How Far Can We Go? Limits of Humanity – Kurzgesagt

Is there a border we will never cross? Are there places we will never be able to reach, no matter how hard we try? It turns out there are. Even with science fiction technology, we are trapped in our pocket of the univ...

Stanford’s one-of-a-kind wind tunnel for birds & drones

An engineering team at Stanford University, lead by engineering professor David Lentink, built a one-of-a-kind wind tunnel in order to observe, measure, and record the minute details of how birds fly. Their goal: To m...

A bumblebee dislodges pollen in slow-mo

Sonication or buzz pollination is the bumblebee's secret weapon of resonant vibration. When bumblebees (and a few other bee species) grab onto a flower and vibrate it by flying in place, securely attached pollen is di...

Roboraptors and the Alarm Call Network

What's one way that you might study bird calls and communication, especially around alarm calls? Try revealing a predator in the forest... but not just any kind of predator. A robo-predator. ...the researchers em­...

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...

Science Extras from Jiwi’s (Rube Goldberg) Machines

A YouTube series that hearkens back to characters and situations from old silent films, Jiwi's Machines mixes a love for Rube Goldberg Machines with an ode to comedy greats like Charlie Chaplin or Buster Keaton. T...

Understanding the Magnetic Sun – NASA Goddard

This dynamic computer model of our sun reveals the behavior of its invisible magnetic structure. The pink and green indicate open magnetic field lines that reach out into space, while the "closed" white lines loop bac...

Will YouTube Ever Run Out Of Video IDs?

Every YouTube video has a unique ID based on a counting system called Base 64. Randomly generated, that Base 64 ID allows YouTube to have a unique yet short url by using the alphabet in lowercase and uppercase plus tw...

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...

Newton’s Three Laws of Motion

Follow four astronauts on a six month journey from Earth to Mars, and see how Newton’s Three Laws of Motion -- 'Newton' referring to English physicist and mathematician Sir Isaac Newton -- can help us understand and p...

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