News
- Earth
A Portrait of Pollution: Nation’s fresh water gets a checkup
Virtually all of America's fresh water is tainted with low concentrations of chemical contaminants, according to a new nationwide study.
- Materials Science
Branching Out: Semiconducting nanotrees could boost electronics
Forests of semiconducting nanotrees could form the basis of future solar cells, low-energy lighting, and other optical or microelectronic devices.
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Breeds Apart: Purebred dogs defined by DNA differences
The most thorough DNA analysis yet of purebred dogs suggests that canine breeds can also be discerned genetically with great accuracy.
- Plants
Wind Highways: Mosses, lichens travel along aerial paths
Invisible freeways of wind may account for the similarity of plant species on islands that lie thousands of kilometers apart.
