Remember the ballerina hippos in the Disney movie, “Fantasia?” They were agile and adorable. In real life, though, hippos are slow, lumbering animals. They can run for short distances, but they prefer to spend most of the day floating in

What if you could look in a second story window without even standing on your tiptoes? Giraffes can. Giraffes are the tallest mammals. Their legs are 6 feet long and...