News
- Earth
Blood levels of BPA become source of controversy
New data question whether human blood measurements of BPA reflect sample contamination or just exaggerated exposures.
- Earth
Aquatic predators affect carbon-storing plant life
Freshwater predator species can prevent the overgrazing of plants that suck up carbon dioxide from the atmosphere.
- Life
Bird, human tweets come from similar parts of the brain
Genetics study finds parallels in birdsong and language.
- Astronomy
Russia meteor virtually impossible to see coming
Current and planned efforts to track near-Earth objects focus on bigger quarry.
- Science & Society
Science News at the 2013 AAAS meeting
A round-up of Science News coverage of the meeting of the American Association for the Advancement of Science held February 14–18, 2013 in Boston.
- Planetary Science
Meteor explodes over Russia
The object is unrelated to February 15 asteroid flyby, experts say.
- Space
Uncertainty at a grand scale
A test of Heisenberg’s principle, on a scale visible to the naked eye, may aid the search for gravitational waves.
- Health & Medicine
A surprise makes memories wobbly
Drug that interferes with recollection works only when people face the unexpected.
- Life
Antianxiety drugs affect fish, too
Perch swim more and eat faster when exposed to concentrations of an antianxiety medication found in rivers.
- Humans
Newborn babies walk the walk
Infants strut a runway wearing electrodes to show how the walking reflex works.
- Animals
Sea slug carries disposable penis, plus spares
A hermaphroditic gastropod sheds its penis after one use, then uncoils another.
- Health & Medicine
To develop male behavior, rats need immune cells
Research reveals unexpected role for cells called microglia in shaping the brain.
