Notes
Blowups Happen, a Future History novelette by Robert A. Heinlein, can be found on pages 51-85.

The text includes illustrations by Charles Schneeman on pages 51, 58 and 71.

This is the original version of the story. A revised and updated version was produced for The Best of Science Fiction (1946) and was also used for all later collections except Expanded Universe (1980) which used the original version.

Reprinted in:

• The Best of Science Fiction (1946, edited by Groff Conklin)
• The Man Who Sold the Moon (1950)
• The Worlds of Robert A. Heinlein (1966)
• A Robert Heinlein Omnibus (1966)
• The Past Through Tomorrow (1967)
• Expanded Universe (1980) [Original version]
• Life Line (1993)
• The Future History of Robert Heinlein: Volume I (2010)