News
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Space
Asteroid-bound: Scientists look for worthy rock
Scientists consider how to pick a prime asteroid for human exploration
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Life
One ocean, four (or more) killer whale species
A new genetic analysis splits killer whales into multiple taxa.
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Health & Medicine
Taste of power goes to the head, then muscles
Just a swish of the carbohydrates in an energy drink can increase muscle performance, a study suggests.
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Health & Medicine
Genetic switch makes old mice forgetful
Reversing a chemical change restored the animals’ memory-making ability.
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Life
Neandertal genome yields evidence of interbreeding with humans
After years of looking, geneticists are shocked to find that 1 percent to 4 percent of DNA in people from Europe and Asia is inherited from Neandertals.
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Chemistry
Decon Green can clean up the most toxic messes, developers claim
A new decontaminant could be a more benign alternative for cleaning up after chemical and biological accidents.
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Life
Undereducated immune cells get aggressive with HIV
Scientists discover a mechanism that makes some people resistant to infection with the AIDS virus.
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Space
New Hubble pictures suggest Milky Way fell together
A preliminary analysis appears to strike a blow against the prevailing theory of galaxy formation.
By Ron Cowen -
Health & Medicine
U.S. childhood obesity rate continues to rise
Only a few states buck the trend toward greater weight gain in kids age 10 to 17, a new survey shows.
By Nathan Seppa -
Earth
Gulf oil spill a slow-motion hurricane
The accident’s timing could determine how badly it damages coastal marshes.
By Janet Raloff -
Health & Medicine
Epigenetic changes show up in people with PTSD
Study finds alterations in genes tied to immune system and brain development, but whether they cause the disorder remains unclear.
By Nathan Seppa -
Physics
Making clouds with lasers
Inspired by a classic particle physics experiment, researchers get water droplets to condense by shooting a light beam skyward.