There's nothing quite like the satisfaction of scrubbing off the dirt, sweat and grime from a long day. A little soap and suds go a long way in keeping us clean, but how did humans wash themselves before the invention of modern soap?
Soap has a pretty simple formula and a long history. But for centuries, water was the primary means of bathing. For example, in the Indus Valley Civilization — a culture that thrived in parts of what is now Pakistan, India and Afghanistan from 2600 to 1900 B.C. — the Great Bath in Mohenjo-daro is considered one of the earliest public baths for steam bathing. But steam only goes so far.
