Origin of the name Bigfoot

Bigfoot was a common nickname for unusually large, aggressive grizzly bears who ate cattle, sheep and attacked people.

• In 1958, a California tractor operator found a series of huge muddy footprints.
• In 1976, naturalist Ivan T. Sanderson published a book where he used footprints, eyewitnesses, and bone samples as potential evidence of "sub-humans" living of five continents, including North America's Sasquatch and the Himalayas' Yeti.
• In 1982, Sanderson's book was followed by the Patterson-Gimlin film. The film became a phenomenon.