Earth's Systems
- Environment
Ozone hits a new low
Scientists discover a major thinning in the protective atmosphere over Arctic.
- Earth
Big rocks’ balancing acts
Scientists study how balanced boulders resist falling over — and what that may say about earthquakes.
- Earth
Tsunami’s trek traced in the sky
Scientists photograph atmospheric ripples that followed the March tsunami across the Pacific.
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- Space
Black hole journey
Research on weird, invisible objects called black holes might help explain how the universe began.
- Earth
Digging into a tsunami disaster
A powerful earthquake under the Indian Ocean changed Earth's surface and spin.
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- Earth
A volcano wakes up
Earthquakes, small eruptions, and a new lava dome unsettle Mount St. Helens.
