Imagine a world where winter never arrives, or summer stretches on endlessly. Sounds like a dream, right? But what if this scenario spelled disaster for life as we know it? In the latest episode of Curious Cases - Series 24 on BBC Sounds, hosts Hannah and Dara dive into a mind-bending question: What would happen if Earth stood perfectly upright, with no axial tilt to create seasons? This isn’t just a thought experiment—it’s a deep exploration into how our planet’s 23-degree tilt might be the cosmic quirk that made life possible. And this is the part most people miss: without that tilt, the climate, ecosystems, and even the course of evolution could have been radically different. Could the dinosaurs still roam if Earth’s axis hadn’t leaned just so? But here’s where it gets controversial: Is our tilted planet a happy accident, or is there something more profound at play? Hannah and Dara consult experts like Dr. Robin Smith, a climate modeling researcher, Professor Rebecca Kilner, an evolutionary biologist, and Professor Amaury Triaud, an exoplanetologist, to unravel this mystery. They also explore listener Andrew’s question from Melbourne, sparking a conversation that blends science, history, and a dash of speculation. What do you think? Is Earth’s tilt a stroke of luck, or is there a deeper reason behind it? Share your thoughts in the comments—this is one debate you won’t want to miss! To listen to this episode and more, visit BBC Sounds or use the BBC App outside the UK. And if you’ve got a burning question about the world around you, send it to curiouscases@bbc.co.uk—your mystery could be the next one solved!
