A big question – is time travel possible? Theoretical physicists are trying to discover whether it is possible to go backward or forward in time! Discover how telescopes looking at distant galaxies and stars look into the past, why an astronaut returned to Earth younger than his identical twin, and much more! Beautifully bound with stunning illustrations, part of a unique and collectable series that will start a lifelong interest in science for kids. With QR code links to the Big Questions Answered website for comprehensive free teacher resources and fun kids’ pack.