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.
- Earth
Water sensor quickly detects algal poison
A new sensor can detect poisons from harmful algae within minutes so that drinking-water plants can start timely treatments.
- Physics
Explainer: How heat moves
Energy moves through the universe one of three ways: conduction, convection and radiation. Only radiation can occur through empty space.
- Animals
Got milk? Roach milk could be a new superfood
Scientists have just figured out the recipe for cockroach milk. And that could be a first step toward making it part of the human diet. Yum!
- Health & Medicine
New study raises questions about cell phone safety
U.S. government study in rats links cell-phone radiation to a small increase in brain cancers and heart tumors. Some scientists now worry about lifetime risks to today’s children and teens.
- Chemistry
Identifying ancient trees from their amber
A Swedish teen’s analyses of a sample of amber may have uncovered a previously unknown type of ancient tree.
- Brain
Headed to a concert this summer? Pack earplugs
Wearing earplugs at concerts and other loud events may prevent hearing loss and permanent ear damage, a new study suggests.
- Brain
Explainer: When loud becomes dangerous
Many people don’t realize that sounds — even those of the music they love — can prove harmful when they get too loud.
- Tech
This door handle kills germs
A high-tech door handle may cut down on disease transmission, say its teen developers. The system is powered by simply opening and closing the door.
- Brain
Trip to Mars could damage astronauts’ brains
Experiments in mice suggest the high-energy particles that would zap astronauts on a mission to Mars could leave the explorers with brain damage.
- Archaeology
Laser vision reveals hidden worlds
From discovering ancient ruins to forecasting climate change, the laser mapping technology called lidar is changing many fields of science.
- Tech
Explainer: What are lidar, radar and sonar?
Radar, sonar and lidar and are three similar technologies. Each relies on the echoing of waves — radio, sound or light waves — to detect objects.
- Space
Radio telescope picks up signals from intelligent life
Astronomers tracked down the source of perytons, mysterious radio bursts. They had at first seemed to emanate from Earth’s atmosphere. Probing now suggests the life forms responsible had a penchant for leftovers.
