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Marbles – The Magic of Making

How do you get different colors to twist and twirl inside of a glass marble? In this video from The Magic of Making, a series of short films for kids created in partnership with BBC Worldwide, we get a peek at how a g...

How balloons are made – The Magic of Making

How are balloons made? In this video from The Magic of Making, a series of short films for kids created in partnership with with BBC Worldwide, we begin with a history lesson about Kew Gardens and stolen rubber trees ...

Why America still uses Fahrenheit

Since I've moved to the US in 2010, there's one thing that I still don't fully understand: the imperial system. Virtually every country on earth uses Celsius but America has yet to follow. Although it might not seem l...

Why is syrup sticky?

Water isn't sticky, and sugar on its own isn't sticky either. So why is syrup—a heated, melty combination of water and sugar—so very, very sticky? Emily Elert of MinuteEarth explains the sticky molecular structures of...

Simplified blower and furnace experiments – Primitive Technology

In an attempt to streamline his previous blower and furnace design, and to make it easier to replicate, Primitive Technology builds a simplified blower from sticks, rope and mud. He then tests it with three charcoal-f...

Demonstrations of the Coanda Effect

Fluids flowing near a surface tend to follow the shape of the surface. Using Schlieren optics, we can see this behavior. It is known as the Coanda Effect and its explanation depends on viscosity, the frictional forces...

How dead is the Great Barrier Reef?

Australia's Great Barrier Reef is the largest coral reef system in the world and the only living structure visible from space. Although ecosystem managers in Australia have worked hard to preserve the reefs, the past ...

Why don’t perpetual motion machines ever work?

Perpetual motion machines — devices that can do work indefinitely without any external energy source — have captured many inventors’ imaginations because they could totally transform our relationship with energy. Ther...

How Maple Syrup is Made | Où se trouve: Garland Sugar Shack

Though the methods and technologies have modernized in recent years, four generations of the Garland family have made maple syrup from the trees on their century-old farm. Stereokroma visits the Garland Sugar Shack in...

Termite clay kiln & pottery – Primitive Technology

If you lived in Far North Queensland, Australia before modern technologies were invented, how might you make a clay kiln and pottery from a termite mound? Primitive Technology takes on the challenge in the video above...

Hydnora africana, the strangest plant in the world?

With no leaves and no chlorophyll, Southern Africa's Hydnora africana is a underground-dwelling parasitic plant in that gets all of its sugars, minerals, and water by attaching to the roots of Euphorbia plants. It als...

Traditional sword making from scratch

Witness the reproduction of the 25th king of the Korean Joseon Dynasty's sword being made from scratch, starting with the building of a brick and clay forge for smelting the powdered iron mixed with sand. The smelting...

Seashell inspiration: Growing cement bricks with bacteria

Imagine an 8-year-old girl studying a seashell on the sand in Gulf Shores, Alabama in 1985. It's her first trip to the beach and it's a moment that will set the course of her career: “The 8-year-old version of mys...

Designing solar panel walls that can recycle & heat greywater

What if the walls of your house could recycle the wastewater from your sinks, showers, baths, and washing machine? Architect Maria Paz Gutierrez is working with environmental engineer Slav Hermanowicz and bioengineer ...

Here’s Where the Juice That Powers Batteries Comes From

Atomic number 3 on the periodic table, lithium is the 'li' in the li-ion batteries that are inside of our smartphones, laptops, digital cameras, and electric vehicles. Above, Alejandro Bucher gives Bloomberg's Ashlee ...

Feynman’s Building Blocks of Thermodynamics

Thermodynamics — 'thermo' meaning heat and 'dynamics' referring to work —is the branch of physics that focuses on the relationship between heat and other kinds of energy. This video from The Royal Institution introduc...

Can Bird Poop Make Clouds?

How does bird poop potentially help to keep our climate just a wee bit cooler? In this episode of Gross Science, Anna Rothschild helps connect tens of millions of seabirds in the Arctic to 40,000 metric tons of ammoni...

The 3-million-year old Ningwu ice cave never thaws

White stalactites hang down from every surface, and the walls and floors are glazed with thick ice. The Ningwu ice cave, also referred to as Wannian Ice Cave in Ningwu County, China, is a unique phenomenon: The subter...

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