Matter and Its Interactions
- Chemistry
Scientists Say: Fulgurite
When lightning strikes in the right place, it can fuse minerals together in a glassy structure.
- Health & Medicine
How hot peppers can soothe pain
Peppers can burn the tongue, but soothe sore tissues. Scientists have now sleuthed out how, and the answer shows a role for stretch sensors on cells.
- Physics
How popcorn got its pop
Popcorn is a popular treat. Now, scientists have learned exactly what happens as it pops. They also have come up with an experiment they hope you will try.
- Materials Science
‘Smart’ windows could save energy
Tiny chemical droplets in a liquid sandwiched between panes of glass turn cloudy when they warm up. This will block some sunlight and potentially save on air conditioning bills.
- Materials Science
Scientists Say: Colloid
When water hovers in the air as fog and when bits of fat disperse in water as milk, they form a type of substance called a colloid.
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Cookie Science 13: The deal with gluten
To find out how to improve my gluten-free cookies, I learned a lot about what gluten does, and what other baking ingredients might take its place.
- Tech
Rewritable paper: Prints with light, not ink
Rewritable paper could save money, preserve forests and cut down on waste — and all without using any ink.
- Agriculture
Explainer: What is a gene bank?
Most banks store money. But some very special ones store deposits that may prove even more valuable: tissues that could prevent the extinction of breeds and species.
- Physics
New particle may help probe strongest force in the universe
A newfound subatomic particle should allow scientists to better understand the strong force that holds together the nucleus of every atom.
- Earth
When life exploded
Life exploded in diversity during the Cambrian Period. Experts are exploring what could account for this sudden change 540 million years ago.
- Health & Medicine
Cookie Science 2: Baking a testable hypothesis
I would like to make a gluten-free cookie that my friend can eat. But to do that, I need to come up with a hypothesis to test.
- Chemistry
Chemistry: Green and clean
“Green” means environmentally friendly and sustainable. Green chemistry creates products and processes that are safer and cleaner — from the start.
