Uncategorized
- Anthropology
Humans in eastern Asia show ancient roots
Human ancestors lived in northeastern Asia about 1.36 million years ago, making it the oldest confirmed occupation site in eastern Asia.
- Health & Medicine
Acacia-tree extract fights cancer in mice
Compounds called avicins extracted from Acacia victoriae, an Australian desert tree, inhibit inflammation and cancer in test-tube and mouse studies.
- Health & Medicine
Germs can survive weeks on fabrics, plastic
Soft, dry surfaces in hospitals can harbor live germs for more than a month.
- Health & Medicine
Blood vessels (sans blood) shape organs
Even before they begin to carry blood, blood vessels provide signals that help spark the development of organs such as the liver.
- Animals
Meerkat pups grow fatter with extra adults
Meerkat pups growing up in large, cooperative groups are heftier because there are more adults to entreat for food.
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18975
We read that the Chaco Anasazi builders used “large timbers” 5 meters long, 22 centimeters in diameter, and weighing 275 kilograms. As anyone who splits his own firewood could tell you, something is amiss here. The Handbook of Chemistry and Physics tells us that ponderosa pine has a density of about 0.5 gram per cubic […]
- Anthropology
Isotopes reveal sources of ancient timbers
Isotopic analysis of architectural timbers from ancient dwellings in the U.S. Southwest has shown from which distant forests the massive logs came.
- Astronomy
Probe’s comet encounter yields close-ups
A crippled NASA probe successfully navigated close enough to Comet Borrelly to capture and beam home black-and-white and infared images of its nucleus and new data about ions and other particles that radiate from it.
- Physics
Atomic Crowds Tied by Quantum Thread
Quantum states of record numbers of atoms—entire atom clouds—get blended together by physicists wielding a new, relatively simple technique in quantum telecommunications and computing.
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Joined at the Senses
As evidence accumulates for the existence of brain cells that handle many types of sensory information, some scientists challenge the popular notion that perception is grounded in five separate senses.
- Astronomy
After a failure, a new craft to sail
Despite the July 20 failure of its mission to test the unfurling of a solar sail in a suborbital trajectory, the Planetary Society announced plans in late August to conduct a second test of a sail-propelled craft.
- Astronomy
A meteorite’s pristine origins
A rare, carbon-rich meteorite that fell into a frozen Canadian lake last year ranks as the most pristine of such specimens ever found.
