Salt mined: This kosher sea salt is taken from what once was a sea in central Utah.

From the Princeton Center for Complex Materials:

This year’s traditional holiday science lecture, “A Grain of Salt: Isn’t it Ionic?” is Saturday, Dec. 12, at 10 a.m. and at 1 p.m. at McDonnell Hall, Room A02.

Professors Howard Stone and Bonnie Bassler will lead an interactive presentation on table salt, or sodium chloride, which is important to human history and vital to human health. Stone and Bassler will discuss properties of salt that make it so universally useful; children ages 7 and up will help demonstrate the chemistry of salt, from its solubility to conductivity.

The lecture is free but advance registration is required.