For as long as humans have lived on Earth, the moon has been our nearest celestial companion, and a rich natural canvas for the human imagination. When the Earth passes between the moon and the sun early on April 15, resulting in a total lunar eclipse, darkness will cover the craters and mountains in which humans, for millennia, have spotted faces and figures.

In Western cultures, perhaps the most familiar vision is "the man in the moon." In East Asian cultures, moon-gazers might point to a rabbit; in India, a pair of hands. From ancient times to the modern era, from different spots on the globe, a tree, a woman, and a toad have all been found hiding in the