Susan Cheever, author of “Drinking in America: Our Secret History,” shares an oft-forgotten detail of the Pilgrims’ arrival at Plymouth Rock. Due to the unsafe drinking water, passengers on the Mayflower drank beer as a main hydration source – each person was rationed a gallon per day. They started to run out as the ship approached Plymouth Rock.

EDITOR’S NOTE: This video was originally published on November 25, 2015.