Animal testing on non-human primates between the monkeys natural behaviors versus the behaviors expressed by the diazepam induced monkeys in thirteen different locations inside the maze. Scientist Barros and his colleagues created this model to allow the monkeys to roam a less confined environment and slightly eliminate outside factors that may induce stress. Many of the best-known allegations of abuse made by animal protection or animal rights groups against animal-testing facilities involve NHPs. The so-called "pit of despair" was used in experiments conducted on rhesus macaque monkeys during the 1970s by American comparative psychologist Harry Harlow at the University of Wisconsin–Madison.<ref name="Blum1994/95">Blum, Deborah. "The Monkey
Ack-Ack Macaque the novel as "inventive" with "brilliant cliffhangers" and a "satisfying conclusion". Philip Reeve said that the novel "could all be quite exhausting, but it's done with such obvious enthusiasm that it's impossible not to be carried along by it." The novel was a joint winner of the 2013 BSFA Award for Best Novel with Ann Leckie's Ancillary Justice. Ack-Ack Macaque Ack-Ack Macaque is a science fiction novel by English writer Gareth L. Powell. "Ack-Ack Macaque" is based on Powell's earlier short story of the same name, which won the "Interzone" reader's poll in 2007. The original short story is included