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| 1897-1961 || Early cryobiology research starts, and reaches one of the first important success by cryopreserving human sperms by 1961.
During that time, the idea of cryonics is conceived by various people; presumably independently from each other. In 1901, Porfiry Ivanovich Bakhmetyev suggests using the phenomenon of anabiosis to prolong human life, to “travel to the future”. In 1931, Neil R. Jones writes a story about someone preserved in orbit because of due to the cold temperature. In 1948, Robert Ettinger publishes a story explaining the idea of cryonics. In 1962, Evan Cooper publishes "Immortality: Physically, Scientifically, Now" and coins the slogan "freeze, wait, reanimate".
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| 1960-1966 || The first cryonics activists start grouping and developing the capabilities to perform cryopreservations. They have difficulty finding a first person interested in receiving the procedure.
