Podcast: An exoplanet with three suns, no relief for aching knees, and building better noses

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Listen to stories on how once we lose cartilage it’s gone forever, genetically engineering a supersniffing mouse, and building an artificial animal from silicon and heart cells, with Online News Editor David Grimm. As we learn more and more about exoplanets, we find we know less and less about what were thought of as the basics: why planets are where they are in relation to their stars and how they formed. Kevin Wagner joins host Sarah Crespi to talk about the latest unexpected exoplanet—a young jovian planet in a three-star system. [Image: Hellerhoff/Wikipedia/CC BY-SA 3.0;Music: Jeffrey Cook]

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