Science Weekly The Guardian

Humans have always been obsessed with getting old, or rather staying young, and now science is beginning to catch up. Longevity has become a hot topic from university laboratories to Silicon Valley startups. In the second of a special Science Weekly three-part mini-series on ageing, Ian Sample talks to Venki Ramakrishnan, winner of the Nobel prize in chemistry and author of the book Why We Die. Venki outlines the most promising scientific advances in the field of longevity and discusses the more unusual ways that the wealthy are trying to extend their lives, from blood transfusions to cryonics. Help support our independent journalism at theguardian.com/sciencepod

Humans have always been obsessed with getting old, or rather staying young, but now science is beginning to catch up. Longevity has become a hot topic, from university laboratories to Silicon Valley startups. In the first of a Science Weekly three-part miniseries on ageing, Ian Sample speaks to Richard Faragher, a professor of biogerontology at the University of Brighton, to discover what we know about the biological hallmarks of ageing in our bodies –and why we have evolved to have the lifespans we do. Help support our independent journalism at theguardian.com/sciencepod

A series of super tusker elephant killings has sparked a bitter international battle over trophy hunting and its controversial, often-counterintuitive role in conservation. Biodiversity reporter Phoebe Weston speaks to Amy Dickman, professor of wildlife conservation at the University of Oxford, about why this debate has become so divisive, and the complexities of allowing killing in conservation. Help support our independent journalism at theguardian.com/sciencepod

Last week, five supporters of the Just Stop Oil climate campaign who conspired to cause gridlock on London’s orbital motorway were sentenced to lengthy jail terms by a judge who told them they had ‘crossed the line from concerned campaigner to fanatic’. Columnist and campaigner George Monbiot tells Ian Sample why the sentences are so significant, how they fit into a crackdown on protest in the UK in recent years, and what impact they could have on future climate activism in the UK. Help support our independent journalism at theguardian.com/sciencepod

Multivitamins are cheap, convenient, and provide a little bit of reassurance if our diet isn’t quite as healthy as we’d like. But a recent study of nearly 400,000 people spanning 20 years found they didn’t help users live longer, and in fact appeared to show a 4% increased mortality risk. Ian Sample hears from JoAnn Manson, a professor of medicine at Harvard Medical School, to find out what the evidence tells us about the overall health benefits of multivitamins, and how consumers can navigate this large and sometimes confusing market. Help support our independent journalism at theguardian.com/sciencepod

Artificial intelligence companies have lofty ambitions for what the technology could achieve, from curing diseases to eliminating poverty. But the energy required to power these innovations is threatening critical environmental targets. Madeleine Finlay hears from the Guardian’s energy correspondent, Jillian Ambrose, and UK technology editor, Alex Hern, to find out how big AI’s energy problem is, and whether it can be solved before it is too late. Help support our independent journalism at theguardian.com/sciencepod