A poor diet can lead to vision loss, experts say. For a teen, it's certainly rare, but a new case study documents blindness in a boy who ate lots of chips, white bread and bits of processed meat.
NPR's Ailsa Chang talks with Steven Davis, earth system scientist with the University of California-Irvine about why global carbon emissions continue to rise, despite efforts and pledges to cut them.
Submarine hobbyists are helping scientists in Montana do environmental research on the state's lakes. Researchers couldn't otherwise afford to rent subs, and it gives the hobbyists a sense of purpose.
The storm has slowed as it passes over the Bahamas, battering the islands. It's expected to move west and north, grazing Florida, Georgia and the Carolinas, but the track is less solid than usual.
Americans born in the '70s and '80s may not be immune to measles, health officials say. If you're traveling to a country or region having an outbreak, consider a second dose of vaccine before you go.
Smithsonian researcher Anna Phillips led the recent discovery of the new medicinal species. Its superficial similarities to a North American leech species helped prevent its detection before.
Pessimists may suspect this finding, but researchers who tracked the health outcomes of thousands of adults across many years found optimists were much more likely to reach 85. Optimism is teachable.