Physics
Scientists made clocks from an atomic nucleus
These super high-tech timepieces use the chemical element thorium to keep time. And as the clocks improve, they could help solve some mysteries in physics.
HS-PS1-2
Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties.
More Stories in HS-PS1-2
- Health & Medicine
Meet CLA, a naturally ‘healthy’ fat in burgers, ice cream and more
Solid at room temp, the natural trans fat conjugated linoleic acid resembles saturated fats — except that it appears good for the body in many ways.
- Chemistry
Explainer: What is chirality?
Chiral molecules are mirror images of each other. They might not seem all that different — but can have drastically different effects in medicine, materials and more.
- Physics
Chopping an onion? Sharp knives can keep its juice out of your eyes
Slow and steady cuts with a sharp blade, video shows, can reduce the pain-inducing spray of tiny onion-juice droplets.
- Chemistry
New materials yank ‘forever chemicals’ from water
Materials known as metal-organic frameworks, or MOFs, trap some PFAS fast — and can be reused again and again.
- Microbes
Thank microbes for chocolate’s tasty flavors
Cocoa beans matter, but yeast and bacteria may be the real secret to fine chocolate flavor.
- Chemistry
Newfound ‘anti-spice’ compounds tame chili peppers’ heat
Five compounds make some chili peppers taste less spicy than others. Scientists are still figuring out why.
- Chemistry
Experiment: How to keep fruit slices fresh
Let’s explore why fruit tends to brown over time and how to keep it looking fresh.
- Chemistry
Teen chemist uncovers potentially harmful preservatives in pet food
Thermo Fisher JIC finalist Mackensey Wilson measured levels of a chemical called BHT in three pet food brands.
- Health & Medicine
Scientists Say: THC
The active chemical in marijuana might have some medicinal value. But studies point to THC's potential risks, especially for teens.
