Big ideas for curious minds are simply explained in this fascinating first introduction to Albert Einstein's theory of relativity. Is there anything faster than the speed of light? What colour are the stars? Is time travel possible? And just what exactly is 'relativity'?Prepare to have your mind blown as you explore the different ideas about light, gravity and space that make up the theory of relativity, from the mind of one of the most famous scientists in the world: Albert Einstein. Through real life examples of physics in action and imaginary 'thought experiments', learn how time can stretch, what it would look like if we travelled at light speed, how black holes work and more! Fun, conversational text breaks down complex ideas so they are accessible to young readers. Created in consultation with Dr N. Baker-Campbell and Dr Matthew Bothwell of the University of Cambridge. Colourful and dynamic illustrations bring abstract concepts to life. For more big ideas, don't miss other titles in the series: Think Big: Secrets of Bees