David Attenborough concludes the documentary series by focusing on the world's deserts. Cameras explore the dry Atacama in Chile, where guanacos survive by licking dew off cacti, and capture rare wild camels eating snow to stay hydrated on Mongolia's Gobi plains. In the rocky Namibian desert, elephants desperately search for food and lions wander the wilderness hunting oryx.
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Warning: Planet Earth season 1 episode 5 guide may contain spoilers