Why babies are powered by rocket fuel, why slime moulds have 13 sexes, and why 98% of the Universe is invisible. Award-winning writer and broadcaster Marcus Chown explains the whole world in one hour. Marcus Chown is an award-winning writer and broadcaster. Formerly a radio astronomer at the California Institute of Technology in Pasadena, he is cosmology consultant of New Scientist. His books include What A Wonderful World, Quantum Theory Cannot Hurt You, Felicity Frobisher and the Three-Headed Aldebaran Dust Devil, and We Need to Talk to Kelvin.