Frozen humans could be brought back to life in 70 years' time.
Valeriya Udalova, the head of the Russian cryo-preservation firm KrioRus, believes that those bidding to come back to life will be thawed out in the coming decades.
The expert revealed that 94 people are housed in frozen chambers at the company's base in Moscow - most of whom have been stored there since the early 2000s.
The majority paid £36,000 for the service, although some have only had their brains frozen for a cost of £8,700.
Udalova said: "Many animals can go into anabiosis - some can freeze and thaw. For example, worms, frogs and Siberian angler fish.
"And, remarkable experiments have already been made, for example on reversible cyro-preservation of a rat kidney."
She added: "Rapid development of cryobiology of large objects - organs and animals - is hindered by extremely low funding of this branch of science."