After a certain age, the prospect of "living forever" loses a little of its appeal as fine lines become noticeable and weekly workouts turn into daily 90-minute marathon sessions that yield a fraction of the desired physical results.
Not too recently I wrote that I would "Die Laughing," and while I added the caveat that I'd also spend the rest of my life "laughing," what I really meant was that in the face of death, I'd basically enjoy the ride.
Metchnikoff's research in the emerging (at the time) study of aging and longevity was groundbreaking. His theory that aging was caused by toxic bacteria in the gut and that lactic acid could prolong life was met with scepticism from leading scientists like Louis Pasteur, Emil Adolf von Behring, and others. Still, were it not for him, we probably wouldn't have probiotics, which reportedly treat a wide array of gastrointentinal ills.
Metchnikoff authored three fascinating books: The Nature of Man, The Prolongation of Life, and Immunity in Infectious Diseases, the last one wasn't exactly a page-turner for me, but I highly recommend The Prolongation of Life.
"If I knew then what I know now."