A French cheesemaker sets up wheels of Reblochon, a semi-soft cheese made from raw cow's milk, for maturing in a farm in the French Alps. Anglophone cheesemakers say translating a French government cheese manual will help them make safer raw milk cheese. Jean-Pierre Clatot/AFP/Getty Images hide caption

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Charlotte Smith, of Champoeg Creamery in St. Paul, Ore., says raw milk may offer health benefits. But she also acknowledges its very real dangers. Courtesy of Champoeg Creamery hide caption

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Current water-filtering technology is costly, but MIT scientists are testing a simpler and cheaper method that uses wood from white pine trees. Wikimedia Commons hide caption

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Microbiologist Christina Agapakis (left) and artist Sissel Tolass show off the cheese they made with bacteria from human skin. The project was part of Agapakis' graduate thesis at Harvard Medical School. Courtesy of Grow Your Own ... Life After Nature at Science Gallery at Trinity College Dublin hide caption

itoggle caption Courtesy of Grow Your Own ... Life After Nature at Science Gallery at Trinity College Dublin

He's not just getting a cold. He's building his microbiome. iStockphoto.com hide caption

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Say hello to your microbiome, Rob Stein. Our intrepid correspondent decided to get his gut bacteria analyzed. Now he's wondering if he needs to eat more garlic and onions. Morgan Walker/NPR hide caption

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Oceans, and the innards of Earth itself, are the final frontiers of our planet. Expect amazing discoveries as explorers document more and more of this unseen realm. Hulton Archive/Getty Images hide caption

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We may not see them, but we need them. iStockphoto.com hide caption

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