News
- Earth
Bioengineered crops have mixed eco effects
An unusually large test of the ecological impact of genetically modified crops finds mixed results, depending on the crop.
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- Earth
Chemical Reaction: Two flame retardants to phase out in 2004
The sole U.S. manufacturer of two widely used brominated fire retardants pledged to phase out its production of both products by the end of next year.
- Animals
Not-So-Great Hunter: Said the spider to the fly—Eek! I’m outta here
The poisonous brown recluse spider may turn out not to be a fearsome hunter so much as a scavenger.
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Calcium Makes Germs Cluster: Ion dilution leads cholera bacteria to disperse
A protein on the surface of cholera-causing bacteria enables the pathogens to clump together in seawater and to scatter when they enter fresh water, perhaps facilitating seasonal outbreaks of cholera in coastal areas.
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Forgetting to Remember: Emotion robs memory while reviving it
A common biological mechanism may boost memory for emotional events and block recall for what happened just before those events occurred, at least over the short run.
- Earth
Frosty Florida: Spread of agriculture may promote freezes
Planting crops in south Florida may have increased the risk of the freezes farmers hoped to avoid.
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Getting Back to Normal: Protein enables the liver to regenerate quickly
A protein called stem cell factor enables the liver to regenerate and may even protect people from acute liver failure.
- Astronomy
Hot and Heavy Star Birth: Young cosmos delivers massive stars
Aided by a gravitational zoom lens, astronomers have discovered the hottest, brightest, and most crowded star-forming region ever observed.
- Earth
Cast-Iron Foot: Undersea snail has mineral armor
An as-yet-unnamed species of snail living around hydrothermal vents deep beneath the Indian Ocean bears a suit of armor forged from the minerals dissolved in the hot fluids that spew from its seafloor environment.
- Health & Medicine
Soy compounds thwart estrogen
Soy-stress compound interferes with estrogen activity, possibly pointing the way to a new breast-cancer drug.
