What started as a small menagerie in 1902 officially became Oklahoma City Zoo in 1903. Journey through the second half century of its illustrious history in Oklahoma City Zoo: 1960-2013. Meet the staff and animals and explore the exhibits that propelled it from a third-class animal facility to one of the best zoos in the United States. In the 1960s, its animal population exploded as knowledge of animal care improved. The zoo soon assembled the largest-known collection of hoofed animals. Later, a rare mountain gorilla named M'Kubwa stole newspaper headlines, a third leopard escaped, and the zoo met its first cheetah babies. The opening of Aquaticus in the 1980s "brought the ocean to the prairie" in the form of a dolphin and sea lion show. Elephants, however, remain the queen attraction at the Oklahoma City Zoo. In 2011, the birth of the zoo's first baby elephant baby, Malee, was a crowning achievement in its 110-year history.