First published in Stellar #7, ed. Judy-Lynn del Rey, Ballantine, 1981.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| August 1981 |
|
Stellar #7: Science Fiction Stories | Del Rey / Ballantine | Anthology | 1 |
| August 1981 |
|
Stellar #7: Science Fiction Stories | Del Rey / Ballantine | Anthology | 1 |
| June 1988 |
|
Minds, Machines and Evolution | Bantam Spectra | Collection | 154 |
| July 1994 |
|
The Ascent of Wonder: The Evolution of Hard SF | Tor | Anthology | 818 |
| October 1994 |
|
The Ascent of Wonder: The Evolution of Hard SF | Orbit | Anthology | 818 |
| October 1994 |
|
The Ascent of Wonder: The Evolution of Hard SF | Tor / SFBC | Anthology | 818 |
| September 1997 |
|
The Ascent of Wonder: The Evolution of Hard SF | Orb | Anthology | 818 |
| December 1999 |
|
Minds, Machines & Evolution | Baen Books | Collection | 177 |