A saguaro cactus hides the sun at the Tucson Desert Museum in Arizona on Tuesday, March 10, 2015.
A saguaro cactus hides the sun at the Tucson Desert Museum in Arizona on Tuesday, March 10, 2015.
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A saguaro cactus hides the sun at the Tucson Desert Museum in Arizona on Tuesday, March 10, 2015.
A saguaro cactus hides the sun at the Tucson Desert Museum in Arizona on Tuesday, March 10, 2015.