Uncategorized
- Astronomy
Not a planet?
New observations add to the evidence that an image of a planetary-mass object discovered beyond the solar system is not that of a bona fide planet.
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19692
In this article, Alycia Weinberger says, “The discovery of a disk around the planetary-mass companion to 2M1207 should be a bit of a relief to planet-formation theorists” because it casts doubt on the object being a planet. But wouldn’t our early solar system have been composed of at least two planets, Jupiter and Saturn, that […]
- Anthropology
Variety spices up Neandertals’ DNA
A surprising amount of genetic diversity characterized Neandertals.
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Sharp rise noted in meds for youths
Antipsychotic-drug treatment of children and teenagers seen by office-based physicians increased dramatically between 1993 and 2002.
- Earth
Gasp! Ozone limits don’t protect babies
In healthy infants, even ozone concentrations well below those allowed by federal law trigger asthmalike symptoms.
- Astronomy
Spewing superdust
Astronomers have identified a type of supernova as the main source of space dust.
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19691
Tiktaalik may not have left the water by choice, to avoid predators, or to get more oxygen. Instead, it might have found itself left behind on a muddy floodplain each time waters receded with the tide. Tiktaalik ‘s “limbs” were probably first developed to survive in an environment that required bracing and stabilizing against currents, […]
- Paleontology
Amphibious Ancestors
Newly discovered fossils from Greenland, as well as a reexamination of those of previously known creatures, are providing researchers with additional insights into ancient vertebrates' move from water to land.
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Growing Up Online
New studies probe some of the many ways, both good and bad, that children and teenagers use the Internet and adapt to online communication.
- Math
Dropping Lowest Scores
Determining which scores to drop when computing a final grade that is to a student's greatest advantage can be tricky. For more math, visit the MathTrek blog.
- Humans
From the June 6, 1936, issue
Young robins ready to solo, threats from space, and molecule models.
- Health & Medicine
Medicine in the News
This Web site from the University of Pennsylvania School of Medicine serves as a clearinghouse for timely medical information. It provides news stories, along with “teaching brief” articles that aim to help clinicians and consumers understand the implications of new discoveries and developments in the medical world. Go to: http://www.medpagetoday.com/
