DNA Has 4 Bases. Some Viruses Swap in a Fifth

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{Photograph}: OMIKRON/Science SupplyDozens of viruses do not use the identical 4 nucleotide bases present in all different life. New work reveals how that is doable—and maybe extra widespread than we predict. All life on Earth rests on the identical basis: a four-letter genetic alphabet spelling out a repertoire of three-letter phrases that specify 20 amino …
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What Forest Flooring Playgrounds Train Us About Children and Germs

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Finnish researchers just published the first big test of the “biodiversity hypothesis”—that exposure to the microbes in dirt is good for young immune systems. As dusk fell on the Finnish city of Lahti on a still chilly day in May 2016, a crew of workers let themselves into the yard of an empty daycare center. …
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