Summer is butterfly time, as the pretty winged creatures flit through the air like flower petals whisked aloft by the breeze. Ancient Greeks derived the idea of a soul, called a psyche, based on a ...

In the 1830s a German naturalist named Renous was arrested in San Fernando, Chile for heresy. His claim? He could turn caterpillars into butterflies. A few years later, Renous recounted his tale to ...