In the 21st century, some of the world's richest people are investing not in new startups or space rockets, but in life-extension technologies. The real currency is not millions, but years – preferably healthy ones. Google founders, Peter Thiel, Jeff Bezos, Sam Altman, and biohacker Bryan Johnson are investing in startups that promise to slow down or even reverse aging. But what of this has a real scientific basis?

LIGA.net I spoke with Nadiia Kupyniak, a scientist and candidate of biological sciences, who explained which technologies are truly promising and which are still at the level of ambitious hypotheses.Subscribe to LIGA PRO to read this article. Go to the full version of the page.