Reviews The Half-life of Facts: Why Everything We Know Has an Expiration Date by Samuel Arbesman Share this: Share via email (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X Click to print (Opens in new window) Print By Science News November 29, 2012 at 7:50 pm Learning how knowledge changes over time, a mathematician contends, will help humans better make sense of their world. Current, 2012, 242 p., $25.95