Space
Fast, mysterious clouds swarm around our galaxy
Astronomers want to know the source — and importance — of these faint, fast-moving clouds that zoom beyond and toward our Milky Way’s disk.
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Earth
Scientists Say: Van Allen belts
Astronomers have detected these radiation belts around Earth and beyond. Jupiter’s belt is thousands of times as intense as Earth’s.
Experiment
Physics
Why are skis so long?
Let’s strap skis to an action figure to see how long sticks of wood help people glide gracefully over snow.
Analyze This!
Animals
Analyze This: Some bats feast on songbirds midflight
Sensor data reveal greater noctule bats chasing, catching and chewing on birds during nighttime hunts.
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Winter weather
Watch This
How to make a pitched ball curve to your will
A range of tricks pitchers use to get curve all come down to the thin layers of air next to the ball — and how a ball’s spin and seams affect them.
