"Reality Check" copyright 2000 by David Brin. Reprinted by permission from Nature, Vol. 404 p.

229. Copyright 2000 Macmillan Magazines Ltd.

"The Millennium Express" copyright 2000 by Agberg, Ltd. First published in Playboy, January 2000.

"Patient Zero" copyright 2000 by Tananarive Due. First published in Fantasy & Science Fiction.

Reprinted by permission of the author.

"The Oort Crowd" copyright 2000 by Ken MacLeod. Reprinted by permission from Nature, Vol.

406 p.129. Copyright 2000 Macmillan Magazines Ltd.

"The Thing About Benny" copyright 2000 by M. Shayne Bell. First published in Vanishing Acts (Tor, 2000), edited by Ellen Datlow. Reprinted by permission of the author.

"The Last Supper" copyright 2000 by Brian Stableford. First appeared in Science Fiction Age, March 2000.

"Tuberculosis Bacteria Join UN" copyright 2000 by Joan Slonczewski. Reprinted by permission fromNature, Vol. 405 p. 1001. Copyright 2000 Macmillan Magazines Ltd.

"Our Mortal Span" copyright 2000 by Howard Waldrop from Black Heart, Ivory Bones (Avon Books/Eos, 2000), edited by Ellen Datlow and Terri Windling.

"Different Kinds of Darkness" copyright 2000 by David Langford. First published in Fantasy & Science Fiction, January 2000.

"New Ice Age, or Just Cold Feet?" copyright 2000 by Nature Publishing Group. Reprinted by permission from Nature, Vol. 405 p. 623. Copyright 2000 Macmillan Magazines Ltd.

"The Devotee" copyright 2000 by Stephen Dedman. First published in Eidolon #29/30.

"The Marriage of Sky and Sea" copyright 2000 by Chris Beckett. First published in Interzone, March 2000.

"In the Days of the Comet" copyright 2000 by John M. Ford. Reprinted by permission from Nature, Vol. 405 p. 889. Copyright 2000 Macmillan Magazines Ltd.

"The Birthday of the World" copyright 2000 by Ursula K. Le Guin. First published in Fantasy & Science Fiction, June 2000.

"Oracle" copyright 2000 by Greg Egan. First published in Isaac Asimov"s Science Fiction Magazine, July 2000.

"To Cuddle Amy" copyright 2000 by Nancy Kress. First appeared in Isaac Asimov"s Science Fiction Magazine, August 2000.

"Steppenpferd" copyright 2000 by Brian W. Aldiss. First published in Fantasy & Science Fiction, February 2000.

"Sheena 5" copyright 2000 by Stephen Baxter. First published in a.n.a.log Science Fiction and Fact, May 2000.

"The Fire Eggs" copyright 2000 by Darrell Schweitzer. Originally published in Interzone, March 2000.

Reprinted by arrangement with the author.

"The New Horla" copyright 2000 by Robert Sheckley. First published in Fantasy & Science Fiction, July 2000.

"Madame Bovary, C"est Moi" copyright 2000 by Dan Simmons. Reprinted by permission from Nature, Vol. 407 p. 137. Copyright 2000 Macmillan Magazines Ltd.

"Grandma"s Jumpman" copyright 2000 by Century Publishing. First published in Century, Spring 2000.

"Bordeaux Mixture" copyright 2000 by Charles Dexter Ward. Reprinted by permission from Nature, Vol. 404 p. 337. Copyright 2000 Macmillan Magazines Ltd.

"The Dryad"s Wedding" copyright 2000 by Robert Charles Wilson. First appeared in Star Colonies (DAW, 2000), edited by Ed Gorman, Martin H. Greenberg, and John Helfers.

"Built Upon the Sands of Time" copyright 2000 by Michael Flynn. First published in a.n.a.log Science Fiction and Fact, July/August 2000.

"Seventy-Two Letters" copyright 2000 by Ted Chiang. First published in Vanishing Acts (Tor, 2000), edited by Ellen Datlow. Reprinted by permission of the author.