Earth
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EarthScientists Say: Avalanche
The word avalanche usually refers to a huge snowslide down a mountain, but it can also be used to describe any large mass of material tumbling downhill.
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EnvironmentLeaky sewer pipes pollute urban streams and bays with drugs
Scientists find that leaking sewer pipes around Baltimore, Md., spew thousands of doses of medicines into the Chesapeake Bay and other waterways.
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ClimateScientists Say: El Niño and La Niña
El Niño and La Niña are part of a climate cycle that results in major weather changes every few years.
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ClimateHere’s how some sea-loving trees ended up far from the coast
This “relict ecosystem” that’s more than thousands of years old moved inland due to warming and a rise in sea levels.
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EarthWhat can ‘silent earthquakes’ teach us about the next Big One?
Earthquakes usually last seconds. But sometimes, they can last days, or even years. Here’s what scientists are learning about these “slow-slip events.”
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SpaceLet’s learn about auroras
A gust of charged particles from the sun called the solar wind lights up auroras on Earth — and on other planets.
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PhysicsScientists Say: Convection
Convection is a process that transfers heat through the movement of liquid or gas.
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EnvironmentEveryday plastics can pollute, leaching thousands of chemicals
Plastic bags and containers leach potentially toxic chemicals into both food and water, but researchers yet don’t know how they might affect health.
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BrainAsk the experts: How to create a top-notch science fair project
Five finalists in the Broadcom MASTERS middle-school competition reveal how they created nationally competitive projects.
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EarthHere’s how ice needles can sculpt natural rock art
Striking stone patterns adorn remote cold landscapes the world over. The recipe for these adornments: Freeze, thaw, repeat.
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AgriculturePotty-trained cows could help reduce pollution
About a dozen calves have been trained to pee in a stall. Toilet training cows on a large scale could cut down on pollution, scientists say.