A bold graduate student idea led to a breakthrough method for tracking the body’s hidden zombie cells. Credit: AI/ScienceDaily.com One of the biggest challenges in aging and disease research is tracking down senescent cells. These cells -- often called "zombie cells" -- stop dividing but refuse to die off normally. Over time, they can build up in the body and have been linked to conditions including cancer, Alzheimer's disease, and the aging process itself. Scientists have been exploring ways