News
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EnvironmentPCB levels still high in Europe’s killer whales, smaller dolphins
PCBs banned for decades still show up at extremely high concentrations in Europe’s killer whales and other dolphins.
By Susan Milius -
LifeSigns of food allergies may be present at birth
Overactive immune cells may prime babies for food allergies.
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ArchaeologyAncient stone tools raise tantalizing questions over who colonized Sulawesi
Hominids reached an island not far from hobbits’ home by around 200,000 years ago.
By Bruce Bower -
AstronomyRed giants map how the Milky Way grew
A new catalog of the ages of our galaxy’s stars confirms that the Milky Way grew from the inside out.