41. The Sumatran / Bornean orangutan started painting in June as part of the zoo's enrichment program, meant to stimulate captive animals . 42. Answers to such questions are revealing a hidden world of marine mammals and helping people take better care of captive animals . 43. Healthy mice have been born with this technology . iPSC may one day be used to treat captive animals with diseases. 44. The hope is that visitors will find the captive animals irresistible and contribute to help save their relatives in the wild. 45. Research is being done on the environmental cues that have to be replicated before captive animals can be persuaded to breed. 46. Longevity in the wild is usually less than six months, but the record for a captive animal is over five years. 47. Due to campaigning by the Captive Animals Protection Society an application was withdrawn to build new exhibits at the falconry site. 48. While the origin of these animals is unknown, cougar experts believe some are captive animals that have been released or escaped. 49. For biologists, Keiko the killer whale was an inspiration to biologists in experiments on returning a captive animal to the wild. 50. He quotes no less an avid hunter than Teddy Roosevelt, who scorned the killing of captive animals as " game butchery ."
