Ash from burnt wood, weeds, bracken, and kelp helped fuel the Industrial Revolution.

Throughout the history of philosophy, literature, art, and science, people have been fascinated with the shimmering surfaces of soap bubbles.

Ivory Soap got its name from Psalm 45.

Procter & Gamble made its industrially produced soap the basis for a revival of an ancient craft, leading to a huge fad for soap carving.

Julia Scott, a writer and radio producer in San Francisco, was recently a test subject for a living ...