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Naked and Afraid is an American reality series that airs on the Discovery Channel.Each episode chronicles the lives of two survivalists (1 woman; 1 man) who meet for the first time and are given the task of surviving a stay in the wilderness naked for 21 days.
Dust devils are believed to play an important role in the climate of Mars. By uplifting large amounts of surface material high above the ground, they may be responsible for as much as 30% of the dust found in the Martian atmosphere, which creates a warming effect and regulates the amount of water vapor in the atmosphere.