Lexicographer Ben Zimmer on the etymology of taking something with a grain of salt.

A phrase with roots in Ancient Rome has confounded English speakers for centuries.

Mike Vuolo and Bob Garfield discuss the etymology and history of the phrase with a grain of salt with Wall Street Journal language columnist Ben Zimmer

http://www.slate.com/articles/podcasts/lexicon_valley/2016/03/lexicographer_ben_zimmer_on_the_etymology_of_taking_something_with_a_grain.html