 Harley gave a speech on the subject of telomeres and telomerase, their discovery in the organism Tetrahymena by Elizabeth Blackburn and Carol Greider, and on the possible connection between telomeres and aging.Harley mentioned that no one had yet been successful in cloning telomerase in human beings.After the speech, Andrews approached Harley and told him that he could clone human telomerase for Geron in three months.