The Patterson–Gimlin film is an American short motion picture of an unidentified subject that the filmmakers have said was a Bigfoot. The footage was shot in 1967 in Northern California, and has since been subjected to many attempts to authenticate or debunk it.

Grover Sanders Krantz was an American anthropologist and cryptozoologist; he was one of few scientists not only to research Bigfoot, but also to express his belief in the animal's existence. Throughout his professional career, Krantz authored more than 60 academic articles and 10 books on human evolution, and conducted field research in Europe, China, and Java.