xkcd, of course. I still haven't explained what I'm up to with this "feature," but all in good time.
Commentary on technologies of reading, writing, research, and, well, knowledge. As these technologies change and develop, what do we lose, what do we gain, what is (fundamentally or trivially) altered? And, not least, what's fun?
Alan Jacobs is a professor of English at Wheaton College and the author, most recently, of Original Sin: A Cultural History. He keeps an online commonplace book here.
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This is of course the macdaddy of all maps ever written.
Primer is maybe the best pure SF film I've ever seen.