How ageing happens and whether it can be slowed has recently become the subject of intense research and investment. Scientists are exploring differing approaches to reducing age-related deterioration, tech billionaires are experimenting with as-yet-unproven interventions. It is entirely possible that by 2100, people will typically live to be 100, thanks to a better understanding of the process of ageing. But is there a limit to how far human lives can be extended?

Host: Alok Jha, The Economist’s science and technology editor. Contributors: Geoff Carr, The Economist’s senior editor (science and technology); Bryan Johnson, a tech entrepreneur and self-declared “rejuvenation athlete”; Paul Knoepfler, a professor in longevity at the University of California, Davis; Irina Conboy, a biotechnology professor at the University of California, Berkeley; Mike Conboy, a researcher at the University of California, Berkeley.

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