Finding Antidotes to Poison

In 16th-century Europe, the most precious thing one could have was not a castle or an army or even gold. The most sought-after by both prince and pauper was an infallible antidote for poison. Guest: Alisha Rankin, Associate Professor of History at Tufts University and author of "The Poison Trials: Wonder Drugs, Experiment, and the Battle for Authority in Renaissance Science"