Anthology inspired by its editor's declaration that "science fiction is a tool for making sense of a changing world"... quite a range of stories, from Elizabeth Bear's "The Something-Dreaming Game," in which children play a fainting game (basically autoerotic asphyxiation), and one girl communicates with (a) member of an alien species, to Tony Ballantyne's "Aristotle OS." In that mind-boggler, a journalist with computer problems upgrades from the familiar, platonic OSs to the titular system... causing... interesting problems when the journalist connects to the Internet... Ken MacLeod's "Jesus Christ, Reanimator" is an interesting take on the second coming, replete with fascinating rationalizations by both scientific and Christian establishments... Louise Marley tells a time-travel story about... the music of Brahms. Other contributions by... familiar and new names... Larry Niven... Brenda Cooper, Mike Resnick... Nancy Kress, Gene Wolfe... a worthy menu of engrossing forays into wildly, creatively varied futures.