The Minnesota Zoo announced Thursday that during a routine medical examination on Wednesday, its 12-year-old Amur tiger experienced cardiac failure and died. The tiger was born in the Czech Republic in 2009 and given the name Putin, then lived at the Denmark Zoo for six years before arriving in Minnesota. At the time of cardiac failure, the tiger was undergoing a preventative health exam, which included sample collection, according to a news release from the zoo. According to the zoo, specimen collection is important due to the globally-threatened nature of the Amur tiger — there are approximately 103 Amur tigers...