- The Colour of Magic (Wikipedia)
The Colour of Magic is a 1983 fantasy comedy novel by Terry Pratchett, and is the first book of the Discworld series. The first printing of the British edition consisted of only 506 copies. Pratchett has described it as “an attempt to do for the classical fantasy universe what Blazing Saddles did for Westerns.”
- Gabriel’s horn (Wikipedia)
A Gabriel’s horn (also called Torricelli’s trumpet) is a type of geometric figure that has infinite surface area but finite volume. The name refers to the Christian tradition where the archangel Gabriel blows the horn to announce Judgment Day. The properties of this figure were first studied by Italian physicist and mathematician Evangelista Torricelli in the 17th century.