He Left MOLDY Food Out... and Saved the World?! Apparently, Alexander Flemings careless decision to leave his petri dish of bacteria exposed led to the discovery of penicillin and changed the course of human history. Who knew being a little sloppy could have such a huge impact on science? watch full video: https://youtu.be/u4FDd1C5rQk?list=PLjBgcvtYPpOR5EnpdrTsvvYOkpZCXBwff










