One day, doctors might be able to insert such devices into a cancer patient to tally how many times a cell divides and flag when to shut the cancer down. (sciencenews.org)
Each subsequent time a cell divides, these circular chromosomes are torn apart unevenly. (newscientist.com)
These caps shorten every time a cell divides, and short telomeres are a sign that the body's cells are wearing out and ageing. (newscientist.com)