News
- Earth
El Niño: It’s back!
An increase in ocean temperatures in the central Pacific heralds the onset of El Niño, whose effects should show up in the United States this fall.
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Malaria parasite reveals old age
The DNA of a malaria-causing parasite suggests it is at least 100,000 years old.
- Health & Medicine
Researchers Probe Cell-Phone Effects
Scientists are trying to find out whether biological changes associated with cell-phone use represent health risks.
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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.
