Earth
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- Earth
Arctic melt
There is less ice than ever recorded in the Arctic Ocean, and scientists are concerned.
- Animals
Eyes on the depths
On a recent expedition to the Bahamas, scientists made new discoveries about how deep-sea animals see the world.
- Earth
The Rise of Yellowstone
New evidence points to a recent, rapid rise of land in parts of Yellowstone National Park.
- Environment
Fear Matters
Halloween can scare kids and make them act strange. But animals and ecosystems respond to fear every day of the year.
- Environment
Acid snails
Changing chemistry in the world's oceans could affect the ability of a snail to defend itself.
- Agriculture
Flush-free fertilizer
Scientists have found a new use for human urine — as a potent crop fertilizer.
- Ecosystems
Underwater jungles
Cold-water-loving kelp forests may be surprisingly abundant in the tropics.
- Environment
Lessons from a lonely tortoise
In the Galapagos Islands, scientists are struggling to save some of the most endangered creatures in the world.
- Animals
Polar bears in trouble
Melting ice is bad news for polar bears that live in northern Alaska.
- Climate
The best defense is a good snow fence
Science fair superstar Erica David shows how fences that trap snow can help the environment.
- Climate
Catching some rays
In a world with increasing energy needs, scientists are turning to plants for help in using solar power.
