Chimpanzees Wall Calendar: Why are the primates almost always the most popular exhibit at the zoo? Why do even adults get absolutely giddy when they happen upon a show about primates on TV? Part of the reason no doubt is that these highly intelligent animals have human-like desires and emotions. Scientists report that chimpanzees share at least 98.5% of their DNA structure with humans! But, thatÂ?s more or less obvious in their facial expressions and body language. If chimpanzees fascinate you to no end, this charming 2012 calendar is sure to please.