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Biological clock study challenged
A report disputes the controversial notion that bright light applied to skin can reset a person's biological clock.
- Health & Medicine
Worm genes take on bacterial foes
Creatures as simple as worms have an effective immune defense.
- Archaeology
Ancient birth brick emerges in Egypt
Investigations at a 3,700-year-old Egyptian town have yielded a painted brick that was used in childbirth rituals.
- Health & Medicine
No worry that this secret will leak
The recently discovered protein angiopoietin-1 appears to protect blood vessels from leaking, a finding with implications for research into diseases that involve swelling, such as arthritis and asthma.
