Carol Greider discovered telomerase activity on December 25, 1984, as a graduate student.
On December 25, 1984, while working under the mentorship of Elizabeth Blackburn at UC Berkeley, Carol Greider discovered the enzymatic activity of telomerase. This groundbreaking discovery occurred during experiments on Tetrahymena, a model organism for studying telomeres. The finding was pivotal, revealing the mechanism by which telomeres are maintained and influencing future research on cancer and aging. Greider’s work overcame technical challenges and skepticism within the scientific community, ultimately redefining our understanding of cellular biology.