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18996
In this article, Alan R. Templeton of Washington University used 10 sources of DNA for his geographic study of human origins. Peter A. Underhill of Stanford feels the population sampled was too small for statistical significance. How many would it take for an expanded version to be significant? Is there a chance such an enlarged […]
- Anthropology
DNA Diaspora: Humanity may share tangled genetic roots
A controversial new genetic analysis concludes that Homo sapiens evolved by expanding out of Africa in multiple waves beginning at least 600,000 years ago and then interbreeding, rather than totally replacing close relatives such as the Neandertals.
- Health & Medicine
Genetic Culprit: Mutation increases risk for uterine fibroids
Analysis of DNA from families whose women have been beset by uterine growths reveals a mutation that can predispose women to these so-called fibroids.
- Planetary Science
Odyssey’s First Look: Craft spies signs of ice at the Martian south pole
Astronomers have for the first time found evidence of large amounts of frozen water in the subsurface of Mars.
- Earth
When the Mercury Falls: Autumn leaves taint river with poison
Fall foliage that collects in stagnant waterways could release significant doses of a highly toxic form of mercury, which has the potential to accumulate in fish living far downstream.
- Earth
Space Rocks’ Demo Job: Asteroids, not comets, pummeled early Earth
An analysis of trace elements found in a variety of meteorites suggests that most of the heavenly objects that rained hell on the inner solar system about 3.9 billion years ago were asteroids, not comets.
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19054
In your coverage of the recent sonofusion work, you make the unsubstantiated and false remark regarding cold fusion and Martin Fleischmann and Stanley Pons: “However, neither the original pair nor anyone else could reproduce those findings, which have largely been discredited as a case study in mistaken science.” The peer-reviewed literature since 1989 does indeed […]
- Physics
Star in a Jar? Hints of nuclear fusion found—maybe
In a bench-top experiment, atomic nuclei may have fused inside rapidly imploding bubbles of vapor in a liquid bombarded by sound waves, but many scientists find the evidence for bubble fusion unconvincing.
- Astronomy
Martian equator: A watery outpost?
A catastrophic outpouring of water—four times the volume contained in Lake Tahoe—may have gushed from fissures near the equator on Mars as recently as 10 million years ago.
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A bitter taste in your . . . stomach
The stomach may be able to "taste" bitter substances.
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Kids’ ADHD tied to snoring, sleepiness
Heavy snoring may contribute to the development of hyperactivity and attention problems in some children, especially boys age 8 and younger.
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19053
As mavericks often are, Egon Brunswik was ahead of his time. It is becoming increasingly apparent that our cognitive abilities are the result of the gradual evolution of neurochemical brain processes that record the often-ambiguous sensory cues we perceive from our external physical and social environment, as well as internal cues from memory, habitual patterns, […]
