Unnatural History is a Canadian-American television series produced by Warner Horizon Television for Cartoon Network and YTV. Originally part of the CN Real block which aired a line of live-action reality shows promoted in the summer season of 2009.
The series is the second scripted, live-action show on Cartoon Network after the failure of Out of Jimmy's Head. The first season consisted of thirteen, hour-long episodes and premiered on Sunday, June 13, 2010. On July 13, the series was rescheduled to Tuesday nights.
It is only the second Cartoon Network show outside of Adult Swim and Toonami to have the U.S. rating of "TV-PG-V", and a parental-guidance warning after every commercial break and at the beginning of the show (the first being Star Wars: The Clone Wars); its rating in Canada for most episodes is "G", or else "PG".
On November 19, 2010, it was announced that Cartoon Network will not renew the series for a second season.