An enormous fan of the Discovery Channel series Planet Earth, Oprah Winfrey is participating in the next high definition nature documentary Life, which premieres Sunday, March 21, 2010. The series took four years to film and originally aired on the BBC network from October to December 2009. Oprah appears in the series as the narrator of the US version of 11-part program. Life is a documentary that follows the behavior of living things as they struggle to survive and procreate their species. Episodes include features on plants, birds, fish, mammals, and many more. The end of each show will also include footage of how the series was made during the years of filming.