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Topic: chemistry
Did an asteroid kill the dinosaurs?
Around 66 million years ago, all non-avian dinosaurs went extinct. Was the culprit a 6-mile wide asteroid that collided with Earth? Or did other factors contribute to the dinosaurs’ die-off? Paleontologist Aki Watanab...
Electrified Pickle
"The first thing to realize is that when you pickle something you put it into a mixture of salt and vinegar. Salt contains ions, sodium ions, chloride ions, and salt solution is electrically conducting, but it's not v...
A brie(f) history of cheese
Before empires and royalty, before pottery and writing, before metal tools and weapons – there was cheese. As early as 8000 BCE, Neolithic farmers began a legacy of cheesemaking almost as old as civilization. Today, t...
Why is water one of the weirdest things in the universe?
Every molecule of water on the Earth and inside you or any other living thing has existed for billions of years. After it came to Earth, that water has been cycling through rocks, air, animals, plants, and back again....
4 levels of brownies, from amateur to food scientist
There are dozens upon dozens of recipes for seemingly straightforward things like chocolate chip cookies or apple pie, with different ingredients, different measurements, different bake times and temperatures. How do ...
Don’t extinguish a metal fire with water
How do you extinguish burning magnesium? In this video from the Royal Institution, science presenter Steve Mould demonstrates what happens when you try to extinguish a metal fire with a CO2 fire extinguisher or water—...
How is black fire made?
This is not a special effect. This is black fire. When you mix a sodium street light or low-pressure sodium lamp with a flame, you'll see a dark flame thanks to the sodium and some excited electrons. "It's strange ...
4 Levels of Spaghetti & Meatballs: Amateur to Food Scientist
We challenged chefs of three different levels - an amateur, a home cook and a professional chef - to make their versions of spaghetti & meatballs. And then we brought in a food scientist to review their work. What...
The Beauty of Flames
The Beauty of Flames captures some extraordinary-looking flames, "the visible, gaseous part of a fire," in this video from Yan Liang's Envisioning Chemistry science and art series. The flames were created by Professor...
Airglow & the secrets behind Earth’s colorful ionosphere
What does our planet look like from space? Most are familiar with the beloved images of the blue marble or pale blue dot -- Earth from 18,000 and 3.7 billion miles away, respectively. But closer to home, within the ne...
What is fire? Is it a solid, a liquid, or a gas?
Sitting around a campfire, you can feel its heat, smell the woody smoke, and hear it crackle. If you get too close, it burns your eyes and stings your nostrils. You could stare at the bright flames forever as they twi...
Melting a metal alloy spoon in some tea
Imagine stirring your tea and having your spoon disappear into your tea... melting quickly away. When one of Professor Sir Martyn Poliakoff's Periodic Videos viewers sent a metal alloy, Field's Metal, to their office,...
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...
What happens to balloon animals in liquid nitrogen?
How can you fit a bunch of balloon animals into a small container? Add some liquid nitrogen into the mix, as demonstrated in this video by Real Physics Live, the YouTube channel for Texas A&M University's Department o...
Use a 9-volt battery to break water into its elemental components
In the 1987 miniseries The Ring of Truth: An Inquiry into How We Know What We Know, Philip Morrison proves that a water molecule is composed of two hydrogen (H) atoms & one oxygen (O) atom with a simple demonstration....
Creating wood ash cement from scratch, an experiment
How do you make a cement-like building material that won't dissolve in water? From scratch? In this Primitive Technology video, an experimental cement is made from crushed terracotta and refired wood ash that was burn...
Pyrotechnics pro Jim Souza explains the art of a massive fireworks show
How do pyrotechnics experts stage professional fireworks shows for holidays and events like the Macy's July 4th Spectacular and both the 100th and 125th anniversaries of the Statue of Liberty? In this Wired video, fou...
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