A customer picks up a block of butter at a food store in Tokyo on Nov. 10. Japanese shoppers are up in arms over a serious butter shortage that has forced Tokyo to resort to emergency imports, as some grocers limit sales to one block per customer. Yoshikazu Tsuno/AFP/Getty Images hide caption

itoggle caption Yoshikazu Tsuno/AFP/Getty Images

Najin, a female northern white rhino, gets a pat from keeper Mohamed Doyo. Najin, who lives at the Ol Pejeta Conservancy in Kenya, is one of only five of its subspecies left in the world. Ben Curtis/AP hide caption

itoggle caption Ben Curtis/AP