1,393 results
- Earth
Algae do battle with bioweaponry
Beneath the frozen surface of Sweden's lakes, algae wage wars over nutrients, and one combatant apparently prevails by releasing chemicals toxic to its adversaries.
- Earth
Germs Begone: New technology cleans dangerous water
For a penny per liter, people in the developing world should be able to remove most pathogens and toxic pollutants from their home drinking water.
- Paleontology
Winging South: Finally, a fly fossil from Antarctica
A tiny fossil collected about 500 kilometers from the South Pole indicates that Antarctica was once home to a type of fly that scientists long thought had never inhabited the now-icy, almost insectfree continent.
- Ecosystems
Pfiesteria’s Bite: Microbe may kill fish by skinning, not poisoning
At least one kind of Pfiesteria—accused of killing fish and threatening human health—does not produce a toxin but kills by eating holes in fish's skin, some researchers say.
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Probing Ocean Depths: Photosynthetic bacteria bare their DNA
Scientists have deciphered the DNA of two highly abundant, photosynthetic ocean bacteria.
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- Earth
Zooplankton diet of mercury varies
By modeling a lake ecosystem in large tubs of water, researchers have found that zooplankton—an important link in the food chain—consume much less toxic methylmercury when the lake experiences an algal bloom.
- Chemistry
Lakes reveal low phosphate concentrations
Researchers using a new technique have found that previous measurements of phosphate, an important nutrient in lake ecosystems, have grossly overestimated its concentration.
- Paleontology
Was it sudden death for the Permian period?
The massive extinctions that came at the end of the Permian period could have occurred within a mere 8,000 years, which suggests a catastrophic cause for the die-offs.
- Earth
The Making of a Grand Canyon
Carving this beloved hole in the ground may not have been such a long-term project.
- Earth
On Thinning Ice
Although some of Earth's glaciers seem to be holding their own in the face of global warming, most of them are on the decline, many of them significantly.
- Chemistry
Hydrogen: The Next Generation
Researchers are looking for more sustainable ways to generate hydrogen, which burns cleanly but is typically made from fossil fuel.
