And what we know, or think we know, about the universe of space and time is changing very quickly.
TimeSpaceThinkUniverseKnowVery
I started writing seriously about 1960, at the fairly advanced age of 30.
AgeWritingSeriouslyStartedAbout
Probably all the books I've ever written have been efforts to define the boundaries of humanity.
HumanityBoundariesDefineBeenEver
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