The desert rose got its name from its blossoms, though the plant is not related to cultivated roses. Herders tie strips of the poisonous bark around the necks of young goats in an effort to protect them from marauding feral cats. Mark W. Moffett/National Geographic hide caption

itoggle caption Mark W. Moffett/National Geographic

Artist Richard Prince is appealing the 2011 ruling that found him liable for copyright infringement. Jeff Kravitz/FilmMagic, Inc via Getty Images hide caption

itoggle caption Jeff Kravitz/FilmMagic, Inc via Getty Images

The sun breaks through dense jungle foliage as South Vietnamese troops, joined by U.S. advisers, rest after a cold, damp and tense night of waiting in an ambush position for a Viet Cong attack that didn't come, January 1965. Horst Faas/AP hide caption

itoggle caption Horst Faas/AP