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Earth
Encyclopedia of Earth
The Encyclopedia of Earth is an online source of environmental information that features objective, authoritative articles written and reviewed by an international community of experts. Topics range from absorption of toxicants and biodiversity to wind farms and zero-point energy. Entries often include images and references. Go to: http://www.eoearth.org/
By Science News -
Earth
A Whale’s Tale: Puzzling marine compounds are natural
Antique whale oil shows that some mysterious compounds that resemble DDT and PCBs are naturally produced.
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This article indicates both the stability of such natural products and their bioaccumulation in organisms at the top of the food chain. It is no doubt prudent that human activity—i.e., chemical manufacturing—should not increase the quantity of these chemicals in the oceans. But it should be recalled that banning of PCBs and similar substances was […]
By Science News -
Trimming Down Cancer: Fat could hinder body’s fight against disease
Fatty tissue may secrete substances that make it harder for the body to battle cancer.
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Health & Medicine
Vanishing Devices: Doctors implant disappearing stents, heart patches
Novel heart devices fashioned mainly from materials that the body can absorb or break down have made their debut in heart patients.
By Ben Harder -
Health & Medicine
Lung Scan: CT may catch some treatable cancers
Computed tomography (CT) scans seem to catch lung cancer early in smokers, but questions remain about the screening procedure.
By Nathan Seppa -
Paleontology
Mastodons in Musth: Tusks may chronicle battles between males
Damage in the fossil tusks of male mastodons suggests that the creatures engaged in fierce combat with rival males at a certain time of year each year of their adult lives.
By Sid Perkins -
Med-Start Kids: Pros, cons of Ritalin for preschool ADHD
A long-term study indicates that 3- to 5-year-olds with attention-deficit hyperactivity disorder who are prescribed the stimulant Ritalin often show behavioral improvements but also display greater sensitivity to the drug's side effects than older children do.
By Bruce Bower -
Genome Buzz: Honeybee DNA raises social questions
Scientists have officially unveiled the DNA code of the western honeybee, the first genome to be sequenced for an animal with ultrastratified societies.
By Susan Milius -
Gene might underlie travelers’ diarrhea
Travelers to Mexico who get diarrhea are more likely than healthy travelers to have a particular variant form of the gene for the glycoprotein lactoferrin.
By Nathan Seppa -
Health & Medicine
Protecting against a difficult microbe
By using DNA from the bacterium Clostridium difficile, scientists have fashioned a vaccine against the microbe.
By Nathan Seppa -
Health & Medicine
Flu vaccine seems to work for kids under 6 months of age
Babies younger than 6 months appear fully capable of responding to a flu shot.
By Nathan Seppa