Topic: measurement

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Why Earth Has Two Levels

Earth’s outer shell is made of two materials whose different densities and thicknesses give rise to two distinct “levels” on the planet’s surface. And evidently these two materials—continental crust and more dense ...

How Dangerous Are The Northwest’s Volcanoes?

In Oregon, Washington and Idaho, magma has erupted out of the ground in at least 25 places in the last 10,000 years, a mere instant in the lifetime of volcanoes that can be hundreds of thousands of years old... But wh...

How deep is the ocean?

How deep is the ocean? How far down have humans traveled and what did we find when we went there? This Tech Insider animation shows us the "vast distance between the waves we see and the mysterious point we call Chall...

How NASA’s InSight Will Plumb the Depths of Mars

Propelled by a predawn rocket launch from California, NASA’s InSight spacecraft is now on a voyage of some six months to Mars to study the deep interior of the red planet. “The science that we want to do with this ...

The SUSTAIN Lab’s Hurricane in a Box

Brian Haus watches as the still air stirs into over 150 mph winds. The flat turquoise water suddenly churns a series of endless crashing waves of white frothy foam. Thankfully, Haus does not have to actually weather t...

Bend-testing laser-cut plywood hinge patterns

Bending a sheet of plywood is made possible when patterns are cut into it. The smaller wood units remain connected while flexing more independently as the piece folds. Laser Artisan demonstrates this hinge-making tech...

Shadows On Other Worlds

Explore the wonder of light from our star, the Sun, and how Shadows On Other Worlds, like on Venus or a faraway planet orbiting the red star Glise 581, would behave a little differently than they do here on Earth. Thi...

The infinite life of pi

The ratio of a circle's circumference to its diameter is always the same: 3.14159... and on and on (literally!) forever. This irrational number, pi, has an infinite number of digits, so we'll never figure out its exac...

Where does Space begin?

How far away is Space from where you are at this moment? How much closer is it when you're flying in a plane? And how close is the International Space Station to Earth if we can spot it in the sky? Travel up, up, u...

Making Artificial Earthquakes with a Four-Tonne Steel Ball

In Göttingen, Germany, there's a four-tonne steel ball that can be raised up a 14-metre tower -- and then dropped in less than two seconds, crashing back to earth. It makes tiny, artificial earthquakes. Tom Scott v...

The Sound of Ice: Skating on thin black ice makes sci-fi movie laser sounds

This small lake outside Stockholm, Sweden, emits otherworldly sounds as Mårten Ajne skates over its precariously thin, black ice. “Wild ice skating,” or “Nordic skating,” is both an art and a science. A skater seeks o...

Anatomy of a hunt: Speed, strategy and survival

As predators chase down their prey on the open savanna it’s a race for survival. Lions and cheetahs are some of the most athletic animals on the planet but strength and speed aren’t everything. By precisely measuring ...

Excavating 101 at the La Brea Tar Pits and Museum

How do paleontologists excavate fossils and what tools do they use? In this video from the La Brea Tar Pits and Museum, Lead Preparator Carrie Howard takes us behind-the-scenes of an excavation where the bones of a sa...

How to make an Amazing 9 Layer Density Tower

Water is less dense than honey. Rubbing alcohol is less dense than water. Poured carefully on top of each other, from heaviest to lightest, they can create distinct layers. Add more liquids of different densities, suc...

A microgravity demo in the Willis Tower Skydeck elevator

The next time you ride an elevator down 103 floors, take a scale with you, because you might want to try this microgravity experiment: In collaboration with Willis Tower, Kevin from the Museum of Science and Industry,...

Sculpting Freddie Mercury

Canada-based Brazilian sculptor and teacher Juliana Lepine sculpts human likenesses with polymer clay. In the video above, she recreates Freddie Mercury, the lead vocalist of British rock band Queen, laying the clay o...

How Kanazawa gold leaf is made

Far too delicate to touch with fingertips—just one ten-thousandth of a millimeter thick—gold leaf foil is an extremely delicate, almost transparent material. It requires a humid climate, pure water for the manufacturi...

Engines of Destruction: The Science of Hurricanes

Harvey, Irma, Jose, Katrina, Maria, Sandy. Hurricanes have been major news stories in 2005 and 2012, and continue to be in 2017, starting in August when Harvey crossed the Caribbean and made landfall in Texas. What ca...

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