Leonard Hayflick

Hayflick Leonard May 20, 1928 - August 1, 2024 Leonard Hayflick, pioneering microbiologist, passed away on August 1, 2024 at his home in The Sea Ranch, California. He is best known for the seminal discovery of "cell senescence" when he found that normal human cultured cells are mortal, popularly called "The Hayflick Limit." His significant contributions also extended to the fields of vaccine development, cell culture technology, microscopy, and intellectual property rights. Leonard Hayflick was born on May 20, 1928 in Philadelphia, Pennsylvania and was the son of Nathan Hayflick and Edna (Silver) Hayflick (pre-deceased). He was a graduate of John Bartram High School of Philadelphia '46 and the University of Pennsylvania PhD '56. He was preceded in death by his beloved wife, Ruth (Heckler) Hayflick. He is survived by his sister, Elaine Rosomoff, and his children, Joel (Louise Band), Deborah Curle, Susan (Penny Hogarth), Rachel Hastings (Jeff), and Annie (Rui Neves) and 8 grandchildren. Family services will be private. Charitable donation suggestions in memoriam to Jewish National Fund, Hadassah, or Planned Parenthood.