Soap

Soap is what we all use to clean our bodies and hands everyday (hopefully). It's been used for a very long time. The question is, how did we come up with the idea? It was actually presented to us. A long time ago, when sacrifices were still welcomed, animals were sacrificed by a river. They were burned, and tossed into the river. The women that came to wash their clothes in the river noticed that water became sudsy, and the clothes were cleaned better. They correlated the sudsy water to the burning of fat, creating soap. Soap is made from fats being broken apart by heat. You start off with a fat and a sodium hydroxide or a potassium hydroxide. When you break off the glycerol, you end up with a crude soap. Then you can make it all pretty and add scents to make it smell good. Soap truly works to make water more runny for lack of a better term. The soap bottles that say "kills 99.9% germs" are lying. They get rid of the germs by rinsing them off of your hands and body.