Krista's conversation with David Montgomery reminded me of my childhood library search for information on the fascinating new idea of plate tectonics. Back in the early 1970's, books on plate tectonics were next to books on ghosts and ESP in the Dewey Decimal System. By the late 1970's, tectonics was taught in my college geology class, but our amazing, beloved elderly professor pointed out that the hot spots like Hawaii were not well-explained by the theory. Thank you for a great show!
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