News
- Astronomy
Ray Tracing: Energetic cosmic rays linked to giant black holes
New observations suggest that ultrahigh-energy cosmic rays originate in the cores of nearby galaxies harboring supermassive black holes.
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Smarty Gene: Breast-fed kids show DNA-aided IQ boost
Breast-feeding substantially boosts children's intelligence, but only if the youngsters possess a specific version of a gene involved in processing mothers' milk.
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Doing the DNA shuffle
DNA near the ends of people's chromosomes shows surprisingly large differences from the corresponding DNA in other great apes.
- Health & Medicine
Nongene DNA boosts AIDS risk
People with a newly discovered genetic variation are more vulnerable to HIV infection.
- Humans
Burdens of knowledge
Greater understanding of the role of genetics in human diseases presents scientists with ethical dilemmas.
- Health & Medicine
Salmonella seeks sweets
A sugarlike substance in the roots of lettuce may attract food-poisoning bacteria.
- Earth
Groundwater use adds CO2 to the air
Pumping out groundwater for crop irrigation or industrial purposes releases planet-warming carbon dioxide into the atmosphere.
- Health & Medicine
Earache microbe shows resistance
A strain of bacterium that causes middle ear infection is resistant to all antibiotics currently approved for the ailment.
- Tech
Hooking up
Cleverly designed molecules can self-assemble into networks and stay robustly connected.
- Health & Medicine
Plugging Leaks: Manipulating receptors may impede sepsis
Manipulation of signaling proteins on blood vessels may help combat sepsis, an often fatal condition.
- Physics
Rock, paper, toxins
A computer model simulates a kind of rock-paper-scissors competition among three species of virtual bacteria.
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Stimulant Inaction: ADHD drug’s mental lift proves surprisingly weak
A widely used drug often calms children with attention-deficit hyperactivity disorder but does little to alleviate the condition's underlying mental deficits.
