Uncategorized
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19815
This article “underscores the vast distances” humans moved from Africa to northern China in 20,000 years. However, if one stops to consider the time frames, it’s extremely unremarkable. At three generations every 100 years and roughly 6,000 miles from Africa to China, people would need to move only an average of 10 miles per generation. […]
- Anthropology
Asian Trek: Fossil puts ancient humans in Far East
A 40,000-year-old partial human skeleton from a Chinese cave intensifies a debate over whether Stone Age people dispersing from Africa interbred with humanlike species that they encountered.
- Health & Medicine
Meningitis vaccine stops ear infections
A vaccine for meningitis and pneumonia also prevents many childhood ear infections and the complications that they cause.
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19814
This study on canker sores compared an “untreated” group with a group using licorice patches. A more valid comparison would be for the control group to be treated with patches that contained no licorice. Janet McClureCardiff, Calif.
- Health & Medicine
Patches take sting out of canker sores
Small patches that exude licorice extract can speed healing of canker sores.
- Earth
On the move
A new study suggests how prions, the infectious agents that cause such disorders as chronic wasting disease, behave in soil and landfills.
- Earth
New solutions for unused drugs
Pharmacists and federal scientists have launched a program to discourage consumers from flushing unused prescription drugs down the toilet.
- Earth
Freeze-thaw cycles: How not to mix soil
The repeated cycles of ground freezing and thawing that occur in many places don't do a surprising poor job of churning the soil.
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Kill-save gene combo might fight malaria
A technique that might someday enlist mosquitoes in the fight against malaria has passed an early test.
- Earth
Wave’s-eye view of a hurricane
Strong hurricanes aren't as effective at transmitting their energy to the ocean's surface as weak ones are, a counterintuitive finding that may help researchers estimate the size of storm surges.
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Rare flower needs prickly neighbors
A flowering plant found only in Mauritius makes more fruit if dense stands of pandanus trees grow nearby.
- Health & Medicine
A Gasping Heart
A common imperfection in the structure of the heart may exacerbate obstructive sleep apnea and, in mountaineers, trigger a life-threatening lung condition called high-altitude pulmonary edema.
