Researchers develop molecular aging clocks for four mammal species (opens in new tab)

Researchers analyzed more than 11,000 gene-activity profiles from tissues in humans, mice, rats and macaques to develop molecular aging clocks, according to descriptions of a Nature study published Wednesday. The clocks are designed to estimate biological aging, distinct from chronological age, by tracking shared molecular signatures linked to aging and mortality across the four mammal species. The research team identified genes whose activity increased in aging cells and others whose activit...