News
- Paleontology
Older Ancestors: Primate origins age in new analysis
A controversial new statistical model concludes that the common ancestor of primates lived 81.5 million years ago, about 16 million years earlier than many paleontologists have estimated.
- Earth
Feminized Frogs: Herbicide disrupts sexual growth
At concentrations currently found in water, the widely used weed killer atrazine hormonally strips male frogs of their masculinity and may be partly responsible for global amphibian declines.
- Health & Medicine
Drug for dry mouth may prevent lung cancer
A drug prescribed for a condition called dry mouth stymies formation of precancerous lung lesions in cigarette smokers.
- Health & Medicine
Gene mutation tied to lung cancer
Scientists have identified a gene, dubbed LKB1/STK11, that is often mutated in people with a particularly deadly form of lung cancer.
