Synopsis
The children are back experimenting with a balloon and the professor talks to them about their experiment.
History
First publication: In the Beginning, Cheap Street, June 1983
Review
A short story that starts with the science of water and water pressure, but then the professor starts talking about underwater people, ultimately giving a lesson against racism and prejudice.
Videos
We have the story in these editions:
Strange Wonders: A Collection of Rare Fritz Leiber Works, hardcover, Subterranean Press, 2010-10-00