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Alien Prop

Photo: Alien prop in museum
Millions of people believe in aliens like this prop in the International UFO Museum and Research Center in Roswell, New Mexico. There is no conclusive evidence of any life beyond Earth, but there is hope: If microbes can live in the pores of rock deep beneath the Earth or at the rim of a scalding Yellowstone spring, then they might find a place like Mars not so shabby.
Photograph by Peter Essick

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