Nebraska Man was a name applied to Hesperopithecus haroldcookii, a putative species of ape. Hesperopithecus meant "ape of the western world," and it was heralded as the first higher primate of North America. Haroldcookii was given as the species name in reference to the original discoverer of the tooth, Harold Cook. It was originally described by Henry Fairfield Osborn in 1922, on the basis of a tooth that rancher and geologist Harold Cook found in Nebraska in 1917. The discovery was made around ten years after the finding of Piltdown Man, another possible human ancestor that turned out to be a hoax. Although Nebraska man was not a deliberate hoax, the original classification proved to be a mistake.
Discovery and Examination 
In February of 1922, Harold Cook wrote to Dr. Henry Osborn to inform him of the tooth that he had had in his possession for some time. The tooth had been found years prior in the Upper Snake Creek beds of Nebraska along with other fossils typical of North America. Dr. Osborn received the specimen in March of 1922, and quickly set out to identify it. Osborn, along with Dr. William D. Matthew soon came to the conclusion that the tooth had belonged to an anthropoid ape (now referred to as simians). They then passed the tooth along to William K. Gregory and Dr. Milo Hellman who agreed that the tooth belonged to an anthropoid ape more closely related to humans than to other apes. Only a few months later, an article was published in Science announcing the discovery of a manlike ape in North America. An illustration of H. haroldcookii was done by artist Amédée Forestier, who modeled the drawing on the proportions of "Pithecanthropus" (now Homo erectus), the "Java ape-man," for the Illustrated London News. Osborn was not impressed with the illustration, calling it: "a figment of the imagination of no scientific value, and undoubtedly inaccurate,"(this quote is not in the article referenced).
From its initial description, Hesperopithecus was regarded as an inconclusive find by a large portion on the scientific community. Examinations of the specimen continued, and the original describers continued to draw comparisons between Hesperopithecus and apes. Further field work on the site in the summers of 1925 and 1926 uncovered other parts of the skeleton. These discoveries revealed that the tooth was incorrectly identified. According to these discovered pieces, the tooth belonged neither to a man nor an ape, but to a fossil of an extinct species of peccary called Prosthennops serus. The misidentification was attributed to the fact that the original specimen was severely weathered. The earlier identification as an ape was retracted in the journal Science in 1927.
Creationism vs. Evolution 
Although the identity of H. haroldcookii did not achieve general acceptance in the scientific community, and the purported species was retracted half a decade after the original article had been published by Osborn, creationists have promoted the episode as an example of the scientific errors that can undermine the credibility of paleontology and hominid evolution theories, and how such information is peer reviewed or accepted as mainstream knowledge. These arguments often exaggerate the wide acceptance of Nebraska man as hominid fossil.
Scopes Trial 
During the same time period as the discovery and examination of the tooth, the teaching of evolution in public schools was under fire in the Scopes trial. The prosecution was led by William Jennings Bryan. Leading up to the trial, Osborn and Bryan were engaged in a back-and-forth debate on the validity of the other's beliefs. However, at the trial, Osborn remained quiet on the subject of Nebraska man. The evidence was starting to build up against Hesperopithecus, and Osborn didn't want to put the defense at risk of losing.
- Osborn, Henry Fairfield (1922). "Hesperopithecus, the first anthropoid primate found in North America". Science 55 (1427): 463–65.
- Gregory, W.K. (1927). "Hesperopithecus apparently not an ape nor a man". Science 66 (1720): 579–81. doi:10.1126/science.66.1720.579. PMID 17810385.
- Wolf, J.; Mellett, J.S. (1985). "The role of "Nebraska man" in the creation-evolution debate". Creation/Evolution (National Center for Science Education) 16: 31–43. Retrieved 10 October 2009.
- Hanegraaff, Hank (1998). The FACE That Demonstrates the Farce of Evolution. Nashville: Word. ISBN 0-8499-4272-1.
- Jeffrey, Grant R (2003). Creation: Remarkable Evidence of God's Design. Waterbrook Pres. ISBN 0921714785.
Further reading 
- Gould S.J. (1991): An essay on a pig roast. In Bully for brontosaurus. (pp. 432-47). New York: W.W.Norton ISBN 0-393-30857-X
- Brian Regal. Henry Fairfield Osborn: Race and the Search for the Origins of Man (Aldershot, UK: Ashgate, 2002).