Uncategorized
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Gene predicts sleepy performance
Variants in a circadian-rhythm gene predict how well people perform mental tasks when sleep deprived.
- Earth
World’s climate map gets an update
A century-old system of categorizing the world's climates has been updated to include modern weather data, thereby providing researchers with a tool to better verify results of their computer simulations.
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19810
I couldn’t help noticing the last sentence in this article: “One of the system’s 30 possible climate subtypes—a temperate climate with a cold, dry summer—wasn’t found anywhere on Earth.” The comment reveals that the writer has never read Mark Twain’s comment that the coldest winter he ever spent was a summer in San Francisco. Jay […]
- Health & Medicine
Hepatitis B found in wrestlers’ sweat
Traces of hepatitis B have turned up in the perspiration of wrestlers, suggesting that the virus could spread to their opponents and teammates.
- Paleontology
Catching evolution in the act
Paleontologists have unearthed fossils that provide direct evidence of something scientists had long suspected: The tiny bones in the middle ears of modern-day mammals evolved from bones located at the rear of their reptilian ancestors' jaws.
- Health & Medicine
Preemies respond to immunizations
Babies born prematurely rev up an immune response to two routine childhood vaccines as well as babies who are born full-term.
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Novel DNA changes linked to autism
Genetic alterations that occur in children without being inherited from the parents contribute to certain cases of autism and related developmental disorders.
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Mental fallout among recent-war veterans
Almost one in three veterans of military operations in Afghanistan and Iraq receiving medical care at Veterans Affairs facilities displays mental disorders or less-severe problems that still require mental-health treatment.
- Planetary Science
Radar reveals signs of seas on Titan
The northernmost reaches of Saturn's moon Titan appear to be covered with hydrocarbon lakes or seas that are at least 10 times as large as those predicted by earlier studies.
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19809
Has anyone ever considered the possibility that interbreeding between Neandertals and humans would have produced sterile individuals? They would have had the traits of both parents, but with no further reproduction, Neandertal DNA wouldn’t be found in humans today. Ernie CasbeerOglesby, Texas Researchers who argue for human-Neandertal hybrids say that fossil evidence argues against sterile, […]
- Anthropology
Mysterious Migrations
Controversial new studies report that modern humans from Africa launched cultural advances in Europe at least 36,000 years ago and reached what's now western Russia more than 40,000 years ago.
- Astronomy
Ticket to Ride?
Astronomers are investigating how they might jump on NASA's lunar bandwagon, using the moon or its environs to study distant stars and galaxies.
