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December 27, 2012 Children can easily become kinder and more helpful. And that behavior makes them more positive, more accepting and more popular with other children, a study of Canadian kids finds.

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December 26, 2012 The year saw some disappointments in the development of drugs to treat Alzheimer's. But the setbacks were offset by progress in other areas. The upshot from this year's mixed results, some scientists say, is that treatment for Alzheimer's needs to start long before forgetfulness and muddled thinking are apparent.

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December 20, 2012 When a meteorite crashed down in April on the exact spot where gold was discovered in 1848, professional and amateur meteorite hunters alike fanned out to collect small chunks. Now more than 50 scientists have published an analysis of the rare space rock.

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December 20, 2012 Many health experts say we should eat less salt, but that's not easy. Salt is added to almost everything that we cook or bake. Are we born with a taste for that much salt, or do we just like what we've always eaten? Scientists say it's some of both.

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December 18, 2012 More than 100 federally owned primates have been the subject of controversy. In 2010, the National Institutes of Health made arrangements to move some retired chimpanzees back into the research, spurring protests. But the NIH eventually decided to accept an independent assessment that found there is almost no scientific need for chimps in biomedical research.

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December 17, 2012 Secretions from a brown frog's skin contain chemicals that might be useful in fighting bacteria. Russian researchers are cataloging compounds in the slimy goo. Although the odds against them are long, the researchers hope their work will aid the search for new drugs.

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December 17, 2012 The two washing machine-sized probes have been collecting data from the lunar surface down to the core. NASA ended the mission by flying the spacecrafts into the side of a mountain on the moon.

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December 14, 2012 Researchers wanted to take a census of all of the insects living in a small section of rainforest in Panama. To do this, they went up in a balloon, hung from a crane and walked atop the canopy in a huge tree raft. All told, they collected almost 130,000 specimens from more than 6,000 species.

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• Slideshow: Up In The Trees

December 13, 2012 Scientists have detected milk fat on 7,000-year-old pottery vessels from archaeological sites in Northern Europe. They think it's the earliest evidence of cheese-making, and they argue dairy products gave early farmers an evolutionary edge.

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