When I first started teaching students about soap science, one of the earliest questions that always came up was: “Why does my soap...

The Joy of Suds There are few things as universally delightful as lather. Whether it is a mountain of bubbles rising from a sink full of...

From ashes to olive oil scrapes, history’s strangest “soaps” will make you grateful for your next bar of handmade lather.

Glycerin rivers: misunderstood magic. Learn the real science behind soap crackles—and how to control or enhance them.