This is an updated/extended version of the original "Where To?" essay from 1952. The "Pandora's Box" essay that appears in "Expanded Universe" explains the revision history in detail, the prose can be summarized like this:
- "Pandora's Box" was the original title of an article researched and written in 1949 for publication in 1950.
- The article was then published (possibly with editorial changes) under the title "Where To?".
- The article was published again in revised form in "The Worlds of Robert A. Heinlein". The revision adds footnotes to some (all?) of the 1950 predictions, with new information from the point of view in 1965.
- The article was revised again for publication in "Expanded Universe". This time the text was changed so that each prediction consists of 3 parts, one for the original prediction from 1950, and two more for comments from 1965 and 1980.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| August 1982 |
|
Expanded Universe | Ace Books | Collection | 316 |
| May 1983 |
|
Expanded Universe | Ace Books | Collection | 316 |
| May 1983 |
|
Expanded Universe | Ace Books | Collection | 316 |
| March 1985 |
|
Expanded Universe | Ace Books | Collection | 316 |
| August 1991 |
|
Expanded Universe | Ace Books | Collection | 316 |
| March 2015 |
|
Expanded Universe: Volume Two | Phoenix Pick | Collection | 46 |
| March 2015 |
|
Expanded Universe: Volume Two | Phoenix Pick | Collection | |4 |
| July 2015 |
|
Expanded Universe: Volume Two | Blackstone Audio | Collection | |4 |
| April 2023 |
|
Expanded Universe: Volume Two | CAEZIK SF & Fantasy | Collection | |4 |