Amazon founder Jeff Bezos, whose hobby is launching rockets into space, is the world’s richest man with a £90billion fortune, a Gulfstream jet and a string of mansions dotted across America.

Who could blame him for wanting to live for ever?

The 54-year-old internet tycoon and a handful of Silicon Valley billionaires are investing chunks of their vast wealth in efforts to extend life by slowing the ageing process.

They include PayPal co-founder Peter Thiel, Oracle founder Larry Ellison and Google billionaires Larry Page and Sergey Brin.

The excitement about longevity is on a par with the buzz surrounding the internet in 1995, according to Jim Mellon, one of Britain’s most successful investors who is leading the anti-ageing race on this side of the Atlantic.

Mellon, who has been dubbed Britain’s Warren Buffett, has set up his own company, Juvenescence, to invest in drugs to extend life – also known as biogerontology.

Last year, he was appointed to the Biogerontology Research Foundation’s board of trustees.

He predicts that medical breakthroughs in age-related diseases such as cancer, new drugs and healthier lifestyles will drive the average life expectancy up to between 110 and 120 years over the next three decades.