Circular sand dunes on Mars mystery

Nevermind earthly crop circles, scientists are scratching their heads over these near-perfect round sand dunes on the surface of Mars - see the images here. Space junk: call out for global clear-out action, we speak to University of Plymouth’s Dr Imogen Napper. How fast is London Tube’s new 5G network? Revealed: How dinosaurs grew into giants.Also in this episode:‘Cut social media by 15 minutes daily for better health’ - studyFear of driverless cars increasesE-scooter rider loses £30,000 crash claimHistory’s most premature twins set world record Hosted on Acast. See acast.com/privacy for more information.