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February 24, 2013 By examining ancient dental plaque, researchers have concluded that prehistoric humans' diets made for healthier mouths. The addition of flour and sugar to modern diets may have set the stage for a near-constant state of oral disease.

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February 22, 2013 A glass of wine can be a welcome sight after a long day watching the kids, but fruit fly moms use alcohol from fermenting fruit to protect their offspring from marauding wasps. That's just one of the ways the tiny flies are using booze to survive the slings and arrows of existence.

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February 22, 2013 Bees and flowers communicate in colors, scents and shapes. Now scientists have discovered that bumblebees can also sense flowers' electric fields. This sixth sense helps them remember and recognize nectar-rich blooms while foraging.

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On Morning EditionPlaylist

February 20, 2013 3-D printing can be used to make food, guns and maybe human ears. Researchers say that using collagen to print out ear cartilage solves a lot of the problems in making new ears for people with birth defects or injuries.

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February 15, 2013 The fallout from Cold War bomb tests is shedding light on why the Achilles tendon heals so poorly after injuries. By looking at carbon-14, scientists have found that tendon tissue in people who were alive during the tests hasn't changed much since they were youngsters.

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February 15, 2013 The notion that being a little overweight could help people in old age is being challenged. Some of the studies in support of the so-called obesity paradox excluded people who lived in institutions, like nursing homes, or were too sick to participate, a critic says.

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February 14, 2013 Kittens regained sight in a blind eye after being plunged into darkness for 10 days. Researchers say that prolonged darkness may reset the brain to an earlier stage of development, allowing the kittens to recover their vision.

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February 14, 2013 Small amounts of the drugs that people take end up in wastewater and then in streams and rivers. It's usually not enough to harm the health of humans who swim in or drink the water. But there is growing evidence that pharmaceuticals in wastewater may affect wildlife.

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On All Things ConsideredPlaylist

February 14, 2013 Crowd funding has proved popular for bands raising money to produce a new album and for producers of documentary films. Now scientists are getting into the act, and some are raising money from the very people they're studying.

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February 14, 2013 What do you do when you're a scientist and you have no job and no money for your research? If you're Ethan Perlstein, you try crowd funding. He raised $25,000 to investigate where the drug methamphetamine is stored in the brain.

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On Morning EditionPlaylist

February 12, 2013 Diclofenac — sold under the brand names Voltaren, Cambia, Cataflam and Zipsor — raises the risk of a heart attack by about 40 percent. But that hasn't prevented the drug from becoming the world's most popular painkiller in its class. Now researchers are calling on the World Health Organization to remove it from a list of so-called "essential medicines."

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February 10, 2013 Every few million years or so, the Earth burps up a super volcano that can erupt continuously for thousands of years. A scientist who's mapping the planet's interior has an idea about what causes these super volcanoes and when we might expect another one.

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On Weekend Edition SundayPlaylist