Think about it. There are so many things that we just see or do on a daily basis that we never think twice about. If you research it hard enough, you guise might find interesting facts or unbelievable histories about the origins of everyday stuff. What everyday thing absolutely fascinates you guise? I think toilet flushing is so weird. There's literally no suction. You dump in some more water in the bowl and then miraculously, the water swirls away and disappears. I researched the physics behind it but I wonder who thought of that first?