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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In Science this week: self-assembly of DNA components in solution, and more.

Genetics and Molecular Research retracts two gastric cancer papers for being "substantially equal" to other papers, according to Retraction Watch.

A new analysis indicates that the Ebola virus behind the current West African outbreak is mutating at about the same rate as other Ebola viruses.

With the launch of Scott Kelly into space today, the study of him and his earthbound brother to disentangle the effects of life in space from the effects of genetics kicks off.