X-Message-Number: 17485 Date: Sat, 08 Sep 2001 18:09:35 -0700 From: Mike Perry <> Subject: Earliest Possible Suspensions Fabio, #17472, wants to know if the first cryonic suspensions in the '60s were the first that were technically feasible. The answer is no, they could have been done earlier but were not, due to lack of interest in this one particular application. Liquid nitrogen was available in quantity by the early 1900s, and glycerol was used as a cryoprotectant for cell samples as early as the '40s. I would give a lot of the credit, when the freezings did start, to the publication of Robert Ettinger's *The Prospect of Immortality* in June 1964, though there were other contributions, such as Evan Cooper's starting the Life Extension Society in December 1963. Mike Perry Rate This Message: http://www.cryonet.org/cgi-bin/rate.cgi?msg=17485