The discovery of exoplanets — worlds beyond our solar system — is heating up, and scientists are racing to find the first Second Earth. Credit: ESA/C. Carreau
Earth & Sky

Worlds beyond the solar system

Planet hunters have found hundreds of exoplanets, but none just like Earth

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shorelines
Earth & Sky

A ghost lake

Scientists study an ancient lake that once covered much of Utah to learn lessons for the future

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hazardmap
Earth & Sky

Eastern quakes can trigger big shakes

Scientists study the widespread impacts of tremors east of the Rockies

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Rocks
Earth & Sky

Big rocks’ balancing acts

Scientists study how balanced boulders resist falling over — and what that may say about earthquakes.

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What a difference! These two images of the sun’s outer atmosphere, or corona, were taken about 20 months apart. The sun is quiet in the picture at left, taken in January 1997. In the picture at right, taken in November 1998, the sun is more active. When the sun’s activity increases, more sunspots become visible.
Earth & Sky

Not seeing sunspots

Scientists predict a delay for the sun’s next cycle

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