News
- Earth
It’s bottoms up for iron at sea’s surface
Sediments drilled from the seafloor off Antarctica suggest that the dissolved iron in surface waters that fuels much of the region's biological productivity comes from upwelling deep water currents, not from dust blowing off the continents.
- Health & Medicine
Vaccine prevents urinary-tract infections
An experimental vaccine designed to repel 10 common bacteria that cause bladder infections has cleared a key hurdle by proving safe and effective in a group of women.
- Astronomy
Galaxy survey sheds light on dark matter
Astronomers are examining some of the brightest objects in the universe to learn about the darkest stuff.
