Physics
Scientists Say: Momentum
This word describes a property of a moving object based on its mass and the direction and speed of its motion.
Physics
More Stories in Physics
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AnimalsMinecraft’s big bees don’t exist, but giant insects once did
Big bees buzz in Minecraft. In our world, blocky bees might starve and be stuck on the ground. Yet long ago, giant insects did roam our planet.
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PhysicsScience offers recipes for homemade coronavirus masks
New studies provide data on what types of mask materials protect best against the virus that causes COVID-19. They also point to the value of a really snug fit.
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Materials ScienceMicro-barbs could make shots less painful
A new type of microneedle design might take the sting out of shots and stick to the skin better than other approaches.
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EarthLet’s learn about earthquakes
Dozens of quakes happen every day, but most aren’t big enough for people to notice.
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Materials ScienceThis ‘living’ concrete slurps up a greenhouse gas
Microbes help harden a mix of sand and gelatin into a living concrete that could interact with people and the environment in great new ways.
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PhysicsExplainer: 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.
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ClimateHow to curb the climate heating by contrails
Contrails are narrow clouds left behind in the sky by jets. They add to climate change. But a new study suggests a way to curb their contribution.
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AnimalsScientists Say: Echolocation
This word describes a method that some animals use to sense their environments by making sounds and listening for their echoes.
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TechHere’s one way to harvest water right out of the air
Need water but you have no access to rain, lakes or groundwater? Materials known as metal-organic frameworks could be used to slurp that water from the air, new data show.