Leonard Hayflick (b. 1928), the recipient of several research prizes and awards, including the 1991 Sandoz Prize for Gerontological Research, is known for his research in cell biology, virus vaccine development, and mycoplasmology. He also has studied the ageing process for more than thirty years. Hayflick is known for discovering that human cells divide for a limited number of times in vitro (refuting the contention by Alexis Carrel that normal body cells are immortal), which is known as the Hayflick limit, as well as developing the first normal human diploid cell strains for studies on human ageing and for research use throughout the world. He also made the first oral polio vaccine produced in a continuously propogated cell strain - work which contributed to significant virus vaccine development.

Title: Jan Witkowski questions Alexis Carrel's experiment

Listeners: Christopher Sykes

Tags: Cold Spring Harbor, Wellcome Foundation, History of Science, Jan Witkowski, Alexis Carrel

Duration: 1 minute, 46 seconds

Date story recorded: July 2011

Date story went live: 08 August 2012