One of the first things visitors to the exhibit will realize is that mummies are not only Egyptian, despite what generations of Hollywood horror movies (thank you, Boris Karloff) might suggest. In fact, only about a third of "Mummies of the World" comes from that ancient culture. Others are from Asia, South America and Europe — everything from a 6,500-year-old Peruvian child to a 100-year-old naturally preserved rat found in a German attic. The only requirement for a mummy is that some soft tissue, such as hair, skin or muscle, must remain on the body. Intent doesn't always enter into the equation.