Discover the origins of water on Earth... with a talking comet! In this full-colour graphic novel, an enthusiastic comet speeds through the universe, from the far reaches of space to planet Earth. Along the way, this rocketing rock reveals how our precious blue planet became, well, blue! With hilarious text and colourful comic book art, this laugh-out-loud non-fiction book will have readers, young and old, thirsty for more science.