Why? with Emma Kennedy

Time travel was once the holy grail of science fiction, but scientists have now shown that time travel into the future is theoretically possible – so why not backwards? If we can use the quirks of physics to move into the future “faster” than we’d get there anyway, could it be possible to move into the past? And if time travel in either direction became possible, what would it do to our world… and ourselves?    Emma Kennedy asks Jim Al-Khalili, famed for The Life Scientific and professor of theoretical physics at the University of Surrey, and Nikk Effingham, professor of philosophy at the University of Birmingham, about our days of future past.    Buy Nikk’s book Does Tomorrow Exist?: A Debate through our affiliate bookshop and you’ll help fund Why? by earning us a small commission for every sale. Bookshop.org’s fees help support independent bookshops too.    Check out Jim’s Radio 4 show The Life Scientific.    WHY? is presented by Emma Kennedy. Produced by Eliza Davis Beard. Audio production and theme music by Jade Bailey. Managing editor: Jacob Jarvis. Group editor: Andrew Harrison. Artwork by James Parrett. Additional music is from Artlist.io. WHY? is a Podmasters Production.     Instagram | X | Threads | Bluesky   Learn more about your ad choices. Visit podcastchoices.com/adchoices

Many of us are obsessed with true crime documentaries and podcasts, and actively seek out the most gruesome details of horrific murder, torture and kidnapping. It’s all pretty horrible – so why are we drawn to it? Does ‘evil’ really exist – and if so, what does it look like? Are people born evil or do they become it over time?    Emma Kennedy is joined by forensic psychiatrist Dr Sohom Das and the UK’s top expert on serial killers, criminologist Professor David Wilson to uncover why we are so obsessed with evil.      Buy Dr Das’ book In Two Minds: Shocking true stories of murder, justice and recovery from a forensic psychiatrist and Professor Wilson’s My Life with Murderers: Behind Bars with the World’s Most Violent Men through our affiliate bookshop and you’ll help fund Why? by earning us a small commission for every sale. Bookshop.org’s fees help support independent bookshops too.    WHY? is presented by Emma Kennedy. Produced by Eliza Davis Beard. Audio production and theme music by Jade Bailey. Managing editor: Jacob Jarvis. Group editor: Andrew Harrison. Artwork by James Parrett. Additional music is from Artlist.io. WHY? is a Podmasters Production.    Instagram | X | Threads | Bluesky Learn more about your ad choices. Visit podcastchoices.com/adchoices

Most of us could list a few physical attributes for our ideal romantic partner – like preferring blondes or men over 6ft tall. But is having a ‘type’ real? If so, how does it develop? Is it biological, or socially constructed? And is the rhetoric of ‘types’ actually dangerous?     Emma Kennedy speaks to University of California Davis Psychology Professor Paul W. Eastwick, and Not My Type: Automating Sexual Racism in Online Dating author and University of Michigan Assistant Professor Apryl Williams, about the psychology and sociology of who we’re attracted to.     Buy Apryl’s book Not My Type: Automating Sexual Racism in Online Dating through our affiliate bookshop and you’ll help fund Why? by earning us a small commission for every sale. Bookshop.org’s fees help support independent bookshops too.  Listen to Paul's new podcast Love Factually here.   WHY? is presented by Emma Kennedy. Produced by Eliza Davis Beard. Audio production and theme music by Jade Bailey. Managing editor: Jacob Jarvis. Group editor: Andrew Harrison. Artwork by James Parrett. Additional music is from Artlist.io. WHY? Is a Podmasters Production.    Instagram | X | Threads | Bluesky Learn more about your ad choices. Visit podcastchoices.com/adchoices

The Moon captivates the human imagination, inspiring artistic creativity, religious fervour and scientific exploration. But what if it were destroyed in some cosmic accident – or by scientific meddling? What would happen to the Earth and its inhabitants? And could humanity survive without it?     Emma Kennedy talks to two space experts – award-winning astrophysicist Professor Ethan Siegel and astronomy journalist Dr. Stuart Clark – about the implications of an enormous cosmic event.      Check out Ethan's Starts with a Bang blog here.   Buy Stuart Clark's Beneath the Night: How the Stars Have Shaped the History of Humankind and Ethan Siegel's Infinite Cosmos through our affiliate bookshop and you’ll help fund WHY? by earning us a small commission for every sale. Bookshop.org’s fees help support independent bookshops too.      WHY? is presented by Emma Kennedy. Produced by Eliza Davis Beard. Audio production and theme music by Jade Bailey. Managing editor: Jacob Jarvis. Group Editor: Andrew Harrison. Artwork by James Parrett. Additional music is from Artlist.io. WHY? is a Podmasters Production.       Instagram | X | Threads | Bluesky Learn more about your ad choices. Visit podcastchoices.com/adchoices