Though sightings of the North American Bigfoot date back to the 1830s (Bord 1982), interest in Bigfoot grew rapidly during the second half of the twentieth century. This was spurred on by many magazine articles of the time, most seminally a December 1959 True magazine article describing the discovery of large, mysterious footprints the year before in Bluff Creek, California.
By Benjamin Radford
The Skeptical Enquirer
A half century later, the question of Bigfoot's existence remains open. Bigfoot is still sought, the pursuit kept alive by a steady stream of sightings, occasional photos or footprint finds, and sporadic media coverage. But what evidence has been gathered over the course of fifty years? And what conclusions can we draw from that evidence?
Most Bigfoot investigators favor one theory of Bigfoot's origin or existence and stake their reputations on it, sniping at others who don't share their views. Many times, what one investigator sees as clear evidence of Bigfoot another will dismiss out of hand. In July 2000, curious tracks were found on the Lower Hoh Indian Reservation in Washington state. Bigfoot tracker Cliff Crook claimed that the footprints were "for sure a Bigfoot," though Jeffrey Meldrum, an associate professor of biological sciences at Idaho State University (and member of the Bigfoot Field Research Organization, BFRO) decided that there was not enough evidence to pursue the matter (Big Disagreement Afoot 2000). A set of tracks found in Oregon's Blue Mountains have also been the source of controversy within the community. Grover Krantz maintains that they constitute among the best evidence for Bigfoot, yet longtime researcher Rene Dahinden claimed that "any village idiot can see [they] are fake, one hundred percent fake" (Dennett 1994).
And while many Bigfoot researchers stand by the famous 16 mm Patterson film (showing a large manlike creature crossing a clearing) as genuine (including Dahinden, who shared the film's copyright), others including Crook join skeptics in calling it a hoax. In 1999, Crook found what he claims is evidence in the film of a bell-shaped fastener on the hip of the alleged Bigfoot, evidence that he suggests may be holding the ape costume in place (Dahinden claimed the object is matted feces) (Hubbell 1999).
Regardless of which theories researchers subscribe to, the question of Bigfoot's existence comes down to evidence- and there is plenty of it. Indeed, there are reams of documents about Bigfoot-filing cabinets overflowing with thousands of sighting reports, analyses, and theories. Photographs have been taken of everything from the alleged creature to odd tracks left in snow to twisted branches. Collections exist of dozens or hundreds of footprint casts from all over North America. There is indeed no shortage of evidence.
The important criterion, however, is not the quantity of the evidence, but the quality of it. Lots of poor quality evidence does not add up to strong evidence, just as many cups of weak coffee cannot be combined into a strong cup of coffee.
Click here to read more and how Bigfoot evidence can be broken down into four general types: eyewitness sightings, footprints, recordings, and somatic samples (hair, blood, etc.). Some researchers (notably Loren Coleman 1999) also place substantial emphasis on folklore and indigenous legends. The theories and controversies within each category are too complex and detailed to go into here. I present merely a brief overview and short discussion of each; anyone interested in the details is encouraged to look further.