News
- Health & Medicine
New embryonic stem cells ratted out
Overcoming obstacles, scientists have created stable embryonic stem cells from rats. Researchers hope their method will prove useful as a general recipe for isolating stem cells from other mammals.
- Health & Medicine
Hot clock key to fruit fly’s global spread
A temperature-sensitive switch in a fruit fly’s biological clock means some species can survive in a wide range of climates while others are stuck on the equator.
- Space
Lopsided universe demands different explanation
Cosmologists analyzing an apparent asymmetry in the pattern of radiation reveal evidence for a new type of field in the early universe.
- Health & Medicine
Sense for morphine has gender gap
Female rats have fewer brain receptors that sense morphine, making the drug less effective. The work points to the need for more research on why medicine potency can vary among people.
- Health & Medicine
Experimental drug fends off emphysema in mice
Mice exposed to cigarette smoke and then ed the drug and fended of emphysema, suggesting the edible drug might help ex-smokers.
- Life
Buzzing bees protect plant leaves
Honeybee air traffic can interrupt caterpillars' relentless munching.
- Earth
Warmer oceans would fuel more thunderstorms
Satellite data reveal more thunderheads forming as tropical sea-surface temperatures rise.
- Humans
Taking trophy heads close to home
Members of the prehistoric Nasca culture in southern Peru took trophy heads from their own people rather than from foreigners captured in wars or raids, a new biochemical analysis suggests.
- Earth
Corals, turfgrass and sediments offer stories of climate past and future
Science News reports from San Francisco at the fall meeting of the American Geophysical Union
- Health & Medicine
For preemies, less is more
Multiple courses of steroid treatment for mom could harm premature babies.
- Health & Medicine
EPA should test demasculinizing pollutants collectively, NRC says
Cumulative effects of phthalates and related compounds likely larger than effects measured one chemical at a time, reports a National Research Council panel.
- Life
Dinosaur day care dads
A new study shows some male dinosaurs may have been the primary caretakers of their young.
