News
- Health & Medicine
Did colonization spread ulcers?
A comparison of strains of Helicobacter pylori, the bacterium that causes ulcers, suggests that colonists brought it to the New World.
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Biodiversity may lessen Lyme disease
A survey of Lyme disease rates suggests that a greater diversity of small mammals and lizards may help keep the rates down.
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Old lemming puzzle gets new answer
A novel analysis suggests food supply variations as the answer to the decades-old puzzle of what makes lemming populations boom and bust.
- Physics
Stretched matter goes to unusual extremes
Researchers have discovered that several unusual forms of matter with extremely high or low densities can expand laterally in one direction and contract in another when extended.
- Animals
Single singing male toad seeks same
Male spadefoot toads of the Spea multiplicata species evaluate male competitors by the same criterion females use.
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Mice have a sharp nose for pheromones
Mice can detect pheromones with great sensitivity and in a way that's distinct from that of the main olfactory system.
- Astronomy
Black holes and galaxies may grow up together
Astronomers have new and, for the first time, quantitative evidence that bigger black holes reside at the centers of bigger galaxies.
- Archaeology
Neandertals’ diet put meat in their bones
Chemical analyses of Neandertals' bones portray these ancient Europeans as skillful hunters and avid meat eaters, countering a theory that they mainly scavenged scraps of meat from abandoned carcasses.
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Brain’s Moving Experience: Motion illusion yields a neural surprise
A brain-imaging study indicates that the primary motor cortex, the control center for issuing motor commands, also aids in the perception of the body's position and planning for upcoming movements.
- Health & Medicine
Male Pill on the Horizon: Drug disables mouse sperm but wears off quickly
A new oral drug created to ease a genetic disorder could have contraceptive benefits.
- Ecosystems
Trust That Bird? A bit of future-think lets jays cooperate
A blue jay will cooperate with a buddy for mutual gain in food despite opportunities to betray the partnership.
- Earth
Dust Up: Office bustle launches anthrax spores
The commotion of everyday business in indoor spaces contaminated with anthrax can launch the bacterium's dangerous spores into the air.
