MS-PS4-2
Develop and use a model to describe that waves are reflected, absorbed, or transmitted through various materials.
- Space
Waves from the birth of time
Inflation is the idea that in the split-second after the Big Bang, the universe exploded into huge-ness. Although the hypothesis is 30 years old, evidence to confirm it had been lacking. Until now.
- Humans
Mummies share their secrets
Cutting-edge technology such as CT, or CAT, scans and endoscopes are allowing scientists to see not just what’s underneath the wrappings but also what’s inside a mummy’s body.
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- Earth
Tsunami’s trek traced in the sky
Scientists photograph atmospheric ripples that followed the March tsunami across the Pacific.
- Tech
Lasers of a feather
A nifty light trick in bird feathers inspires researchers to create a new kind of laser.
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Kids’ ingenuity honored at Intel ISEF
Young scientists receive awards in international competition.
- Tech
Cell phones on the brain
When an active cell phone is pressed against the ear, the brain gets busier.
- Environment
Underwater racket
The oceans are getting louder, and scientists want to know what that means for marine residents.
- Physics
Explainer: What is a laser?
Lasers are the brightest source of light on Earth and produce the purest form of color possible.
- Physics
Explainer: How a synchrotron works
Giant magnets direct superfast light into beams up to 30 million times as bright as those produced by a laser pointer.
