On a cold January day in 2017, nearly two months before due date, Nile hippopotamus Bibi gave her keepers at the Cincinnati Zoo and Botanical Garden a big surprise: a tiny newborn hippo, no bigger than a football. The first premature hippo born and raised in captivity, baby Fiona was an underdog from the start: she couldn't nurse, she couldn't stay hydrated, and she wasn't thriving. But the staff at... see more