Recently, Radiolab received an email in response to the show Mortality.
Hi, my name's Duncan, and I'm a fan of your mortality show. I'm in grade 8, and I was wondering how Leonard Hayflick could separate the cells in order to feed them. I have been studying cells for quite a while, and I would like to be able to experiment with the Hayflick limit.
Well, Duncan, ask and you shall receive. Here's the answer, straight from Dr. Hayflick himself:
Don't try this at home! Although you could, kinda... because you've already got that chemical he was talking about--Trypsin--right in your own body. It just happens to be a main enzyme found in the stomach that breaks down the protein you eat. Gurgle.