News
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Cells in bloodstream don’t refill ovaries
Contrary to a report published last year, cells that circulate in a female mammal's blood don't seem to restock its egg supplies.
- Anthropology
Mexican find reveals ancient dental work
A 4,500-year-old human skeleton found in Mexico represents the earliest instance in the Americas of intentionally modified teeth, apparently to create space for a ceremonial mouthpiece.
- Paleontology
Sticky Subjects: Insights into ancient spider diet, kinship
Remnants of a spider web embedded in ancient amber suggest that some spiders' diets haven't changed much in millions of years.
- Earth
Toxic Leftovers: Microbes convert flame retardant
Bacteria can break down a common flame retardant into more-toxic forms.
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Older but Mellower: Aging brain shifts gears to emotional advantage
The aging brain reorganizes in ways that foster emotional stability and a tendency to favor positive emotions over negative ones.
- Ecosystems
A Chronicle of Coasts: Study charts historical changes in seas, estuaries
New research compares the long-term ecological impact of human activities in estuaries and coastal seas on three continents.
- Animals
Fishy Reputations: Undersea watchers choose helpers that do good jobs
Coral reef fish use smart-shopper techniques of looking for satisfied customers before choosing a small fish to provide cleaning services.
- Health & Medicine
Proof of Protection: Condoms limit infection by cervical cancer virus
Condom use reduces a woman's risk of being infected with human papillomavirus and of developing precancerous growths on the cervix.
- Astronomy
Magnetic Thrust: Fields force matter into black holes
New observations confirm that magnetic fields provide matter with the last push to plunge into a black hole.
- Health & Medicine
Antidepressant drugs show link to diabetes
People taking antidepressant medication might be at increased risk of developing diabetes.
- Health & Medicine
New drugs reduce blood sugar
Two experimental drugs can lower blood sugar significantly in people with type 2 diabetes.
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Three gene variants boost diabetes risk
Researchers have linked small variations in three genes to type 2 diabetes.
