It has been a much happier spring season at Ohio’s Cincinnati Zoo than last spring. Last May, zoo officials there shot and killed one of their gorillas, after a young child fell into its cage. Officials feared the animal would hurt the child. The killing of the gorilla, named Harambe, led to public outrage. People across the United States -- and world -- still remember Harambe’s story. This spring, however, zoo officials have been celebrating the birth and survival of a baby Nile hippopotamus. Her name is Fiona. She was born on January 24 six weeks early. Her premature birth meant she had many health problems. At birth, she weighed just 13 kilograms. That is more than 10 kilograms smaller than the lowest-known birth weight for Nile hippos. Animal experts feared Fiona would not survive. But she did. And zoo officials have been sharing happy updates on Fiona with the public.