A hippo, an orangutan, and a scientist walk into a milk bar... or so our story goes. In January 2017, a baby hippo was born at the Cincinnati Zoo six weeks premature and some 30 pounds underweight. Her name was Fiona, and getting her to put on pounds was a life or death matter. Unfortunately, nursing wasn't an option and the only hippo formula recipe on file was old and out of date. To devise a new one, team Fiona turned to the scientists at the world's largest exotic milk repository at the Smithsonian's National Zoo. But could they do it in time…and would Fiona drink it?