When will the Venusian colonists declare independence, according to Robert Heinlein's early stories? Now you can consult this handy future history chart, first published in the 1941 Astounding Science Fiction, and find out. Click to make huge. [Potrzebie]
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I think I have this chart in one of Heinlein's book, somewhere at home.. In Time Enough for Love, if I'm not mistaken...