HS-PS4-4
Evaluate the validity and reliability of claims in published materials of the effects that different frequencies of electromagnetic radiation have when absorbed by matter.
- Animals
This tube worm’s glowing slime may help sustain its own shine
Snot oozed by a marine tube worm can glow for up to 3 full days. The secret of how this works might lead to long-lasting lights that glow on and on.
- Physics
Explainer: Rainbows, fogbows and their eerie cousins
Light shining through a water droplet can make more than just a rainbow. A range of other colorful arcs also can develop.
- Health & Medicine
New ultrasound treatment kills off cancer cells
Low-frequency ultrasound destroys cancer cells while leaving most healthy cells intact.
- Science & Society
Science isn’t just for scientists
It doesn’t take an advanced degree or a lab to do science. All you need is curiosity and an interest in learning something new every day.
- Physics
Explainer: Understanding waves and wavelengths
A wave is a disturbance that moves energy from one place to another. Only energy — not matter — is transferred as a wave moves.
- Health & Medicine
Experts rethink need for X-ray shielding of patients
For close to 70 years, workers who perform X-ray scans of the body have been advised to shield sensitive tissues with lead 'aprons.' That may soon stop.
- Materials Science
Here’s how to hide some objects from heat-sensing cameras
A special coating that conceals temperature information from heat-detecting cameras might someday be used as a privacy shield.
- Physics
Here’s how quantum mechanics lets heat cross a vacuum
Heat can move across a vacuum if the span is small enough. As in really, really small. In a new experiment, the gap was only a few hundred nanometers.
- Health & Medicine
Explainer: What is ultrasound?
These sound waves, which fall above the range of human hearing, are important in medicine, medical imaging and more.
- Computing
Fingerprints could help keep kids from dangerous websites
A teen develops a program that estimates age based on someone’s fingers
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Protecting deer with high-pitched noises
After her uncle crashed his truck into a deer, this teen decided to find out if there was a sound that would drive the animals away from roads.
- Microbes
Tweaked germs glow to pinpoint buried landmines
Finding landmines could become much safer with a new technology. It uses genetically modified bacteria that glow under laser light.
