The Discworld is the fictional setting for all of Terry Pratchett's Discworld fantasy novels. It consists of a slightly convex disc (complete with edge-of-the-world drop-off and consequent waterfall) resting on the backs of four huge elephants which are in turn standing on the back of an enormous turtle, named Great A'Tuin (similar to Chukwa or Akupara from Hindu mythology) as it slowly swims through space. The Disc is heavily influenced by magic and while similar to planet Earth, it generally conforms to its own laws of narrative causality. Pratchett first explored the idea of a disc-shaped world in the novel Strata (1981).