Bombyx mori 300 to about 900 m (1,000 to 3,000 ft) long. The fibers are very fine and lustrous, about 10 μm (0.0004 in) in diameter. About 2,000 to 3,000 cocoons are required to make a pound of silk (0.4 kg). At least 70 million pounds of raw silk are produced each year, requiring nearly 10 billion cocoons. Due to its small size and ease of culture, the silkworm has become a model organism in the study of lepidopteran and arthropod biology. Fundamental findings on pheromones, hormones, brain structures, and physiology have been made with the silkworm. One example of this was
Cormoran Strike without trace. Quine, once hailed as a literary rebel —has struggled for years to recreate the success of his original novel and has fallen out of public favour. Strike discovers that his disappearance coincides with the leak of a manuscript for his latest novel, "Bombyx Mori". The London literary community considers "Bombyx Mori" to be unpublishable; an unpleasant mix of rape, sadomasochism, torture, necrophilia and cannibalism, the hero is eventually tricked and eaten alive by various characters who are thinly-veiled caricatures of people in Quine's life whom he considers responsible for the destruction of his career. The investigation soon takes