News
- Chemistry
Follow the lead
A new water-soluble, lead-sensing chemical is the first to detect the toxic metal in live cells.
- Archaeology
Ancient rains made Sahara livable
New evidence indicates that seasonal rainfall more than 7,000 years ago turned Africa's eastern Sahara desert into a savannalike area that attracted an influx of foraging groups.
- Health & Medicine
Freeing Up the Flow: Clearing neck-artery blockage diminishes signs of depression in elderly
Propping open a clogged carotid artery may ease symptoms of depression in elderly people.
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Old Mice and Men: Species share genetic markers of aging
The amounts of protein produced by a particular set of genes could give researchers clues to how much a person or another animal has aged.
