Fact sheet.First published: Analog, November 1962.
Download full text from Project Gutenberg.
Among the stories from Astounding/Analog issues edited by John Campbell.
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Trying to figure out science fiction
11:30 pm in this clock (that's 6 pm GMT).
The clock shows India time (IST). Note India doesn't have any concept of daylight saving time; so if your locale has it, the relative posting time will appear to have changed with your time change.