He lies frozen inside a thermal sleeping bag immersed in liquid nitrogen in an aluminum pod he shares with three other preserved humans within a giant vacuum flask known as a dewar.

On June 5, 1885, Dewar was able to liquefy air. By 1991, he could produce liquid oxygen in large quantities. ... Dewar flask. This breakthrough allowed Dewar to continue his efforts.

Frozen 50 years ago, James Bedford’s body is given a ‘new coat’ before being re-immersed in a new liquid nitrogen dewar at Alcor cryogenic facility in Arizona. Picture: Alcor.