From Instapundit‘s Mark Tapscott:

THE HISTORY OF SOAP: Now that we’re all washing our hands repeatedly throughout the day, check out The History Guy’s account of how we got soap. Did you know archeologists discovered a recipe for soap in the ruins of ancient Babylon, circa 2200 BC? 

Follow the link for an interesting twelve-minute video. Plenty of other videos may be seen at The History Guy’s webpage and YouTube channel home page