MS-PS4-2
Develop and use a model to describe that waves are reflected, absorbed, or transmitted through various materials.
- Chemistry
Sleep-friendlier lighting is on the way
Chemists have created a new glowing material for LEDs. It should lessen how much near-bedtime lighting impairs your ability to nod off.
- Physics
Stars made of antimatter could lurk in our galaxy
Fourteen sources of gamma rays in our galaxy look like they could be antistars — celestial bodies made of antimatter.
- Physics
Getting cozy with a science experiment
Items you use in your home can inspire a scientific experiment.
- Planets
Signs of a hidden Planet Nine in our solar system may be an illusion
Hints of the remote planet, also called Planet X, relied on clumped up orbits of bodies beyond Neptune. A new study suggests that clumping doesn’t exist.
- Physics
Scientists Say: Radiation
Radiation is the motion of energy through space as waves or particles.
- Climate
COVID-19 cut pollution in 2020, warming the atmosphere
Pandemic-related lockdowns briefly warmed the planet. The reason: The cleaner air carried fewer planet-cooling aerosols.
- Animals
Fin whales could help scientists map what lies below the seafloor
Fin-whale calls are loud enough to penetrate into Earth’s crust, offering scientists a new way to study the properties of the ocean floor.
- Brain
New technology can get inside your head. Are you ready?
New technologies aim to listen to — and maybe even change — your brain activity. But just because scientists can do this, should they?
- Physics
Scientists Say: Piezoelectric
Piezoelectric materials produce an electric voltage when they are bent or squished. This can let us harvest electricity from movement.
- Physics
Physicists have clocked the shortest time span ever
The experiment revealed how long it takes light to cross a hydrogen molecule: just a couple hundred zeptoseconds.
- Physics
What did you say? Fabric masks can really muffle voices
Some types of face masks muffle speech more than others — something that teachers should take into account.
- Space
Our feverish universe is getting hotter every day
For the first time, astronomers have taken the temperature of the cosmos at different times in its history. Galaxy clusters are cranking up the heat.
