(Found via Transhumanity). Scientists are making good progress in uncovering the biochemical mechanisms of cellular aging, as reported by Cancer Research UK. This has implications for cancer diagnosis and treatment, as well as for aging research. The work builds on recent studies involving telomeres, protective caps on the end of chromosomes. Scientists have now uncovered the mechanisms that prevent a cell from further dividing once telomeres have worn away. This is an important step forward, hopefully the first of many more.