As foreshadowed by Heinlein in Methuselah's Children...in 1958 "Yes, yes," agreed Hardy. "Naturally---but what is the basic process?" "It consists largely in r

As foreshadowed by Heinlein in Methuselah's Children...in 1958 "Yes, yes," agreed Hardy. "Naturally---but what is the basic process?" "It consists largely in replacing the entire blood tissue in an old person with new, young blood..."