“Notice that even though the impala has the ability to jump thirteen feet high and thirty feet out, the African impalas are contained here at the zoo by a three-foot wall!” This grabbed my attention too. “Stop right there! How is it that an animal with the ability to jump thirteen feet high and thirty feet out can be contained by a three-foot wall?” I asked. Darrell went on to explain that when the impalas are young, they are taught they can’t jump over the three-foot wall. Zoo personnel do this