There is a body of films that are set on the planet Mars. In the late 19th century, people erroneously believed that there were canals on Mars. Into the early 20th century, additional observations of Mars fed people's interest in what was called "Mars fever". One of the earliest films to be set on Mars was the short film A Trip to Mars (1910), which was produced by one of Thomas Edison's film companies. In the 1920s through the 1960s, more films featured Mars or extraterrestrial Martians. In the 1960s and 1970s, the Mariner program and the Viking program revealed new scientific details about Mars that showed little prospect for life. The Guardian said, "These disappointing discoveries changed the place of Mars on humanity's mental map. Films began to reflect this." Films such as Total Recall (1990) and Red Planet (2000) focused more on the colonization of Mars by humans.