Earth
- Environment
Cleaning up fish farms
Although fish farms can supply lots of food, these operations may also cause pollution and hurt wild populations.
- Environment
Saving wetlands
In Louisiana and elsewhere, wetlands are disappearing, threatening plant and animal life.
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- Climate
Arctic algae show climate change
Sediment from Arctic lakes shows that much of the Northern Hemisphere has been warming for many decades.
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- Environment
Spotty survival
The northern spotted owl faces unpredictable threats and an uncertain future.
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- Earth
Wave of destruction
The recent Indian Ocean tsunami was one of the most deadly and destructive natural disasters in modern times.
- Earth
Digging into a tsunami disaster
A powerful earthquake under the Indian Ocean changed Earth's surface and spin.
- Animals
A fallout feast for crabs
Crabs can take advantage of hot, toxic plumes from undersea vents to feed on poisoned plankton.
- Environment
The birds are falling
The disappearance of many birds could harm ecosystems that depend on them.
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