Reviews The Half-life of Facts: Why Everything We Know Has an Expiration Date by Samuel Arbesman By Science News November 29, 2012 at 7:50 pm - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Print (Opens in new window) Print Learning how knowledge changes over time, a mathematician contends, will help humans better make sense of their world. Current, 2012, 242 p., $25.95