Earth is a 2007
nature documentary film which depicts the diversity of wild habitats and creatures across the planet. The film begins in the
Arctic in January of one year and moves southward, concluding in
Antarctica in the December of the same year. Along the way, it features the journeys made by three particular species—the
polar bear,
African bush elephant and
humpback whale—to highlight the threats to their survival in the face of rapid
environmental change. A companion piece to the 2006
BBC/
Discovery television series
Planet Earth, the film uses many of the same sequences, though most are edited differently, and features previously unseen footage.