News
- Anthropology
New age for ancient Americans
New radiocarbon dates indicate that the Clovis people, long considered the first well-documented settlers of the New World, inhabited North America considerably later and for a much shorter time than previously thought.
- Chemistry
Lighting up for uranium
A portable sensor could make it possible to rapidly detect environmental uranium contamination.
- Ecosystems
Warming Sign? Larger dead zones form off Oregon coast
Unprecedented recent changes in the yearly pattern of ocean currents off North America's West Coast have wreaked havoc on aquatic ecosystems there, another possible symptom of Earth's warming climate.
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Decoding Autism: Study finds DNA clues to developmental disorders
New results direct the search for autism-influencing genes to a previously overlooked DNA segment and highlight the role of a crucial chemical-messenger system in creating brains susceptible to autism.
