A collection of fascinating essays on popular science by the author of Einstein's DreamsFrom the dependence of a ballerina on the laws of physics to the choice every scientist makes between tinkering and theorizing; from the unscientific nature of discovery to the mystery of human flight without propellers and the impulse behind the unprompted smile: in Dance for Two Alan Lightman offers readers a look into the creative compulsions shared by the scientist and the artist, and a glimpse as well into his own imagination.A classic collection of essays from one of the foremost popular science writers of his generation.