Acknowledgment is made for permission to reprint the following material:
“New Light on the Drake Equation,” by Ian R. MacLeod. Copyright © 2001 by SCIFI.COM. First published electronically on SCI FICTION, May 23, 2001. Reprinted by permission of the author and the author’s agent, Susan Ann Protter.
 
“More Adventures on Other Planets,” by Michael Cassutt. Copyright © 2001 by SCIFI.COM. First published electronically on SCI FICTION, January 10, 2001. Reprinted by permission of the author.
 
“On K2 with Kanakaredes,” by Dan Simmons. Copyright © 2001 by Dan Simmons. First published in Redshift (Roc), edited by Al Sarrantonio. Reprinted by permission of the author.
 
“When This World Is All on Fire,” by William Sanders. Copyright © 2001 by Dell Magazines. First published in Asimov’s Science Fiction, October/November 2001. Reprinted by permission of the author.
 
“Computer Virus,” by Nancy Kress. Copyright © 2001 by Dell Magazines. First published in Asimov’s Science Fiction, April 2001. Reprinted by permission of the author.
 
“Have Not Have,” by Geoff Ryman. Copyright © 2001 by Spilogale, Inc. First published in The Magazine of Fantasy & Science Fiction, April 2001. Reprinted by permission of the author.
 
“Lobsters,” by Charles Stross. Copyright © 2001 by Dell Magazines. First published in Asimov’s Science Fiction, June 2001. Reprinted by permission of the author.
 
“The Dog Said Bow-Wow,” by Michael Swanwick. Copyright © 2001 by Dell Magazines. First published in Asimov’s Science Fiction, October/November 2001. Reprinted by permission of the author.
 
“The Chief Designer,” by Andy Duncan. Copyright © 2001 by Dell Magazines. First published in Asimov’s Science Fiction, June 2001. Reprinted by permission of the author.
 
“Neutrino Drag,” by Paul Di Filippo. Copyright © 2001 by SCIFI.COM. First published electronically on SCI FICTION, August 22, 2001. Reprinted by permission of the author.
 
“Glacial,” by Alastair Reynolds. Copyright © 2001 by Alastair Reynolds. First published in Spectrum SF 5. Reprinted by permission of the author.
 
“The Days Between,” by Allen Steele. Copyright © 2001 by Dell Magazines. First published in Asimov’s Science Fiction, March 2001. Reprinted by permission of the author.
 
“One-Horse Town,” by Howard Waldrop and Leigh Kennedy. Copyright © 2001 by SCIFI.COM. First published electronically on SCI FICTION, March 4, 2001. Reprinted by permission of the authors.
 
“Moby Quilt,” by Eleanor Amason. Copyright © 2001 by Dell Magazines. First published in Asimov’s Science Fiction, May 2001. Reprinted by permission of the author and the author’s agents, the Virginia Kidd Literary Agency.
 
“Raven Dream,” by Robert Reed. Copyright © 2001 by Spilogale, Inc. First published in The Magazine of Fantasy & Science Fiction, December 2001. Reprinted by permission of the author.
 
“Undone,” by James Patrick Kelly. Copyright © 2001 by Dell Magazines. First published in Asimov’s Science Fiction, June 2001. Reprinted by permission of the author.
 
“The Real Thing,” by Carolyn Ives Gilman. Copyright © 2001 by Spilogale, Inc. First published in The Magazine of Fantasy & Science Fiction, July 2001. Reprinted by permission of the author.
 
“Interview: On Any Given Day,” by Maureen F. McHugh. Copyright © 2001 by Maureen F. McHugh. First published in Starlight 3 (Tor), edited by Patrick Neilsen Hayden. Reprinted by permission of the author.
 
“Isabel of the Fall,” by Ian R. MacLeod. Copyright © 2001 by Interzone. First published in Interzone, July 2001. Reprinted by permission of the author and the author’s agent, Susan Ann Protter.
 
“Into Greenwood,” by Jim Grimsley. Copyright © 2001 by Dell Magazines. First published in Asimov’s Science Fiction, September 2001. Reprinted by permission of the author.
 
“Know How, Can Do,” by Michael Blumlein. Copyright © 2001 by Spilogale, Inc. First published in The Magazine of Fantasy & Science Fiction, December 2001. Reprinted by permission of the author.
 
“Russian Vine,” by Simon Ings. Copyright © 2001 by SCIFI.COM. First published electronically on SCI FICTION, June 6, 2001. Reprinted by permission of the author.
 
“The Two Dicks,” by Paul McAuley. Copyright © 2001 by Spilogale, Inc. First published in The Magazine of Fantasy & Science Fiction, August 2001. Reprinted by permission of the author.
 
“May Be Some Time,” by Brenda W. Clough. Copyright © 2001 by Dell Magazines, Inc. First published in Analog Science Fiction and Fact, April 2001. Reprinted by permission of the author.
 
“Marcher,” by Chris Beckett. Copyright © 2001 by Interzone. First published in Interzone, October 2001. Reprinted by permission of the author.
 
“The Human Front,” by Ken MacLeod. Copyright © 2001 by Ken MacLeod. First published as a chapbook, The Human Front (PS Publishing). Reprinted by permission of the author.