A month-old white rhino calf lies next to his mother, named Marina, at the Madrid Zoo, Thursday, June 4, 2009. The unnamed white rhino calf is only the third in the world to have been conceived through artificial insemination.The baby has yet to be named. The zoo plans to hold a contest asking the people of Madrid to choose between Cronos and Olimpo.
AP Photo/Victor R. Caivano
