Animals Disappeared at Milwaukee County Zoo
One of the rhinoceros at the Milwaukee County Zoo disappeared on Friday.
It was part of Endangered Species Day.
They took Mimi, the black rhino, out of her exhibit and in her place left only bones.
The zoo is demonstrating what the world would be like if endangered animals like Mimi were to go extinct.
Along with the missing rhino there were educational activities for kids to do at the zoo today to learn more about endangered species.