Facts change all the time. Smoking has gone from doctor recommended to deadly. We used to think the Earth was the center of the universe and that Pluto was a planet. For decades we were convinced that the brontosaurus was a real dinosaur. Knowledge, like milk, has an expiry date.
- The Half-life of Facts: Why Everything We Know Has an Expiration Date by Samuel Arbesman
- The Half-life of Facts: Why Everything We Know Has an Expiration Date by Samuel Arbesman
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