Earth
- Fossils
South America’s sticky tar pits
The fossil-rich tar pits of Venezuela may rival those in Southern California.
- Agriculture
Farms sprout in cities
The farms of the future may be where you would least expect to find them -- in towering skyscrapers in some of the world's largest cities.
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- Earth
Where rivers run uphill
Three scientists travel to Antarctica to explore a secret world hidden beneath the ice.
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- Environment
Polar ice feels the heat
This is the first of a two-part series on global climate change.
- Earth
Salty, old and, perhaps, a sign of early life
Exploring salt deposits, researchers unearthed the planet's oldest-known, complete molecules thought to have been made by living things.
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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.
