News
-
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.
-
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.
-
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.
- Earth
UV-pollutant combo hits tadpoles hard
Coincident exposure to ultraviolet light and an estrogen-mimicking pollutant severely jeopardized the chance a tadpole would reach adulthood.
- Earth
Sewage linked to fish-gender quirks
Releases from sewage treatment plants appear to impair reproductive tissues in fish.
- Earth
Pollutants shape baby-gator gonads
The same pollutants that appear to shorten the length of a grown-alligator's phallus actually lead to this organ's lengthening in baby gators.
- Earth
POPs treaty enacted
A new United Nations treaty that seeks to phase down or eliminate production and use of 16 persistent, toxic pollutants has gone into effect.
-
Underwater balancing act
Researchers have identified a gene that influences the growth of crystals in the inner ears of zebrafish and found that modifying this gene can cause the fish to lose their sense of gravity.
