An undated photo provided by the Cincinnati Zoo & Botanical Garden shows Nikki, an endangered rhino who died Thursday, July 3, 2014. Nikki's cause of death is unclear, but she showed signs of illness ... more 
An undated photo provided by the Cincinnati Zoo & Botanical Garden shows Nikki, an endangered rhino who died Thursday, July 3, 2014. Nikki's cause of death is unclear, but she showed signs of illness last month. Nikki produced a calf in the first live birth of an Indian rhino conceived by artificial insemination. (AP Photo/Cincinnati Zoo & Botanical Garden ) less 
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Associated Press | Photo By Cincinnati Zoo & Botanical Garden
Fri, Jul 4, 2014 4:00 PM EDT