Topic: measurement

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Shattering glass with the World’s Largest Horn

How do horns amplify sound? Why are they flared at the ends? And how do airhorns work? Mark Rober wanted to find out so he spent eight months building a massive air horn... perhaps the world's largest horn. In this...

How far would you have to go to escape gravity?

Every star, black hole, human being, smartphone and atom are all constantly pulling on each other due to one force: gravity. So why don’t we feel pulled in billions of different directions? And is there anywhere in th...

Revealing the true scale of the universe with VFX

When watching a video like this classic planet and star size comparison, do we really have a clear understanding of just how small we are in the scale of the universe? To better understand the size of our largest star...

How to make a rocket

"What's the best scientific formula for a powerful rocket with oxidizer and fuel?" In this video clip from Bang Goes The Theory Series 5, via BBC Earth Lab, we get a quick peek at the mix of chemistry and physics that...

Four levels of chocolate chip cookies: From amateur to food scientist

Learn a few professional tips of what to do (and maybe what not to do) when baking this classic: Chocolate chip cookies. Amateur baker Alina, home cook Lorenzo, and Penny, a professional chef, demonstrate how they mak...

Which life form really dominates Earth?

In 2018, there are around 7.6 billion people on the planet, but weigh us all together on a giant scale and we only make up 1/10,000 of Earth’s biomass. What is biomass? And what life forms dominate the rest of the pla...

LEGO in Real Life: Creating a classic duck pull toy in LEGO stop motion

A boy creates a wooden duck pull toy in a woodworking workshop, but the materials aren't wood. It's all LEGO... even some of the tools and the paint. This new stop-motion animation from Brick Bros Productions riffs of...

The secrets of citrus micro-jets, captured in high speed

Peel an orange or a lime and then bend a section of fruit until the liquids squirt from the skin at 30 feet per second. At what point did the skin give way? Where did the micro-jets shoot? Why did the skin of citrus f...

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...

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