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
Mark Mori 1994 Sundance Film Festival, Grand Jury Prize nominee and 1995 WGA TV Documentary, Current Events Award nominee and in 2000, Executive Produced and Directed, the investigative TV documentary, "Wayne Williams and the Atlanta Child Murders" for Court TV. Mori also founded the production company Single Spark Pictures in 1996. He is the namesake for his nephew, Mark Mori. Mori's first documentary film "Building Bombs" had a limited theatrical release in 1989. It was nominated for a 1990 Academy Award and was re-released in 1991. Mori produced and directed the film with Susan J. Robinson. Narrated by Jane Alexander, the film