The multi-tissue epigenetic clock is published

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Steve Horvath reports a predictor of chronological age built from DNA methylation at 353 CpG sites that works across most human tissues. For the first time ageing has a cheap, quantitative, tissue-general readout — and immediately the question of whether that readout is a measure of ageing or a correlate of it.

A node is not a place. Drawing it on a map would assert something about the world that no stored fact supports.