much the same way the Dutch sailor Abel Tasman managed to do with Australia, but did get to have an island named after him). Krull The most notable nation to lie on the Rim (it actually juts slightly over it) is the island kingdom of Krull. The nation's capital is also called Krull (featured in The Colour of Magic), and a local river is known as the Hakrull River (mentioned in Mort). Its economy is largely based on the capture and salvage of nautical wreckage as it heads towards the Rimfall. To aid in this, the Krullians constructed the Disc's largest manmade object: the Circumfence, a great net that extends across a third of the Disc's perimeter. Now in disrepair, it is still maintained by the occasional guardian, such as Tethis the sea troll. Due to its unique position, Krull is one of the Disc's main centres of astronomical and astrological learning; indeed until recently, its high priest was also its chief astronomer. Krull possesses a magical University and, unlike the Unseen University in Ankh-Morpork, the Krullians have no problem educating female wizards. Krullians are noted for their habitual nervousness and fatalism, the product of spending their lives overlooking a bottomless black abyss of infinity. On the Disc, the phrase "being on edge" is a reference to the Krullians. In The Colour of Magic and The Last Hero, it has been shown that life does exist over the Rim of the Discworld, whether that be rimfishers (kingfisher specially adapted to living over the rim) or entire islands populated by the survivors of shipwrecks and their possible descendants. Lifeforms Pratchett created or adapted a variety of fictional lifeforms for the Discworld setting, both sentient and non-sentient. Sentient species Pratchett populated the Discworld with his own interpretations of numerous classic fantasy and mythological races as well as humans. While humans are portrayed as the main inhabitants of the major Discworld cities, many other races have left their traditional domain and integrated with other, sometimes hostile, species in Discworld's cities. Though Discworld races are often inspired by other authors' versions or by real-world mythologies, they may have different characteristics than their prototypes. For example, Discworld trolls are made of stone rather than being turned to stone by sunlight like Tolkien's trolls; Discworld Furies have physical similarities to the Furies of Greco-Roman myth, but have different roles. In the list below, Discworld races are