A researcher from the University of California at Los Angeles used computational approaches to come up with an epigenetic clock for estimating tissue age based on cytosine methylation marks. As he reports in Genome Biology online, Steve Horvath used array-based methylation profiles from thousands of human tissue samples to home in on a few hundred epigenetic marks that apparently correspond with chronological age in multiple tissue types.

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Science speaks with the University of Michigan's Jedidiah Carlson, who has tracked population genetic discussions at white nationalist sites.

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NPR reports that the US House of Representatives has passed a bill to enable terminally ill patients access to experimental drugs.

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