Professor Jim Al‑Khalili, a leading figure in physics, has criticised attempts by some technology billionaires to extend life indefinitely as “a waste of time,” and said he will set out a proposed solution to the longstanding 'arrow of time' puzzle in a series of lectures at the Royal Institution.
Al‑Khalili's comments come amid growing public interest in a variety of anti‑ageing measures. He contrasted mainstream lifestyle trends — such as unregulated peptide injections, cold plunges and dietary supplements that some members of the public use in pursuit of longer life — with far more extreme interventions pursued by a handful of extremely wealthy individuals.
Among the high‑profile examples is company founder Bryan Johnson, who at one point experimented with transfusions of plasma from his teenage son. Johnson later reported that he had observed no clear benefit from that procedure. Al‑Khalili used such cases to argue that many of these high‑cost efforts are unlikely to deliver the dramatic outcomes their proponents seek.
In announcing his forthcoming Royal Institution talks, Al‑Khalili said he would offer a fresh perspective on the 'arrow of time' — the physical distinction between past and future that underpins why ageing and entropy proceed in one direction. He positioned this as a scientific, rather than a commercial, approach to questions about ageing and the limits of life extension.
The debate over life extension bridges scientific, ethical and commercial concerns, from unregulated therapies adopted by individuals to deep‑pocketed ventures pursuing radical biomedical interventions. Al‑Khalili's intervention frames those efforts against fundamental physical constraints and signals that he intends to address the deeper theoretical issues behind ageing in his public lectures.