AP | published: July 1, 2018

In this June 26, 2018, photo Fiona, a baby Nile Hippopotamus, sleeps in her enclosure beside a copy of "Saving Fiona," posed for a photograph at the Cincinnati Zoo & Botanical Garden, in Cincinnati. The Cincinnati Zoo's globally famous premature hippo does more than help sell T-shirts, bobbleheads and ice cream. She is becoming a teaching tool in classrooms and libraries and subject of a series of books with the latest by the zoo's director Thane Maynard. (AP Photo/John Minchillo)