Related: How does soap kill germs? Ancient forms of soap are hard for historians to trace because of one major barrier: "Soap degrades," said Seth Rasmussen, a chemist historian at North Dakota ...

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 ...