Incredible But True Incredible But True Human World History Makers Cities Of The World Art And Music Sporting Headlines Plant Life Fish, Amphibians, Reptiles Birds and Mammals Creepy Crawlies Marine Life Restless Earth Earth's Secrets Changing Weather Seas And Oceans Comparisons Amazing Structures Machines And Man World Of Inventions Travelling Around Mysterious Universe	Superlatives - Longest The longest earthworm in the world is the South African Microchaetus. In 1937 a record-breaking specimen was found in the Transvaal. It was an astonishing 6.7 metres long and 20 millimetres in diameter. An earthworm   Previous: Back Book: Incredible But True Section: Incredible But True Chapter: Creepy Crawlies