Pilobolus began as an experiment among three guys and one puzzled professor in a  Dartmouth dance class back in 1970. It was survival of the giddiest, as the three non-dancers goofed around with the material they'd been given --  themselves -- and got entangled in science-inspired poses (think: "soft-belly  protoplasmic thing") and movements. From these humble, biological beginnings  has  emerged an innovative, unlikely and almost-uncategorizable dance  company  that combines athleticism, grace and humor with a profound sense of  unity.  The Sound is God Music by George Crumb.