Sarah Barker is an astrophysicist, science communicator and producer with years of experience turning ambitious ideas into award-winning television and live events. She has collaborated with NASA, National Geographic, Discovery, the BBC and Channel 4 on various programmes, including `Live from Space' and `Earth Live'. Originally from the UK, Sarah currently lives in Brooklyn, New York. Maria Nilsson is a freelance illustrator based in London. Her illustrations are heavily influenced by the natural world, exploring various tactile qualities of colour, pattern and texture. She is the illustrator behind 50 Things to Do with a Penknife, 40 Knots and How to Tie Them and Pittipat's Saucer of Moon.