Moomintroll decides to find out. So, with Sniff, he sets off on an expedition to ask the Professor if a comet is really on its way to destroy the Earth. On their journey they meet some interesting people - such as Snufkin the super tramp, and the Hemulen who rescues them from an underground tunnel - and have narrow escapes from such menaces as crocodiles and giant lizards! And on their way back Moomintroll meets the beautiful Snork Maiden and is a changed Moomin for ever after. But what about the comet - and is the World Wiped Out?... Tove Jansson was born in Finland in 1914. She began her career as a cartoonist and went on to write and illustrate many books for adults and children.