Many animals have powers of perception that lie far beyond human comprehension. Take electroreception, the method by which sharks and rays scan for the electrical fields of their prey, or the magnetoreception that helps homing pigeons find their way. But, as mind-bending as these abilities are, I am almost more awestruck by those animals who rely on senses just like our own—smell, sight, taste, and so on—but do so through entirely different means.