Three provocative tales of far from mundane worlds where transformation is the order of the day. Terry Carr offers the strange avians of Starmont and the humans who don wings to share the challenge of the universe's highest peak. Richard Lupoff provides a time machine that unlocks the mysteries of the universe but fails to satisfy an adamantly unscientific investor. The prolific Silverberg describes a post-ecological holocaust earth inhabited by strikingly original mutants. Novel novellas.