Soap has a pretty simple formula and a long history. But for centuries ... This basic formula was key to premodern soaps in ancient civilizations. Plants; animal bile; oils; and exfoliants ...

A brilliant and persistent surgeon staked his life and fortune on a process that would change everything. But luck is a ...

Legend has it that the first soap was accidentally produced on Mt. Sopa, a site of animal sacrifice. As the goat meat burned, fat dripped down through the fire, bonding to lye leaching out of the ...