William Henry Andrews (born December 10, 1951) is an Americanmolecular biologist and gerontologist whose career is centered on searching for a cure for human aging. Andrews is the founder and president of the biotechnology company Sierra Sciences.[1] In the 1990s, he led the team at Geron Corporation that was the first to successfully identify the genes for human enzyme telomerase.[2][3][4][5] This enzyme is responsible for preventing telomeres from shortening in human primordial germ cells (reproductive cells).[6]