Drug discovery penicillin. This happens from errors as Alexander Fleming's bacteria Staphylococcus. To cause (Septicemia) or situations in septic shock he culture bacteria put sea plants on Petri dish and cover tightly. Stored in temperature 37 degrees Celsius. But then one day, his assistant had forgotten to close the lid plate experiment. It was also found that there are a kind of green mold plate full up around this fungus has become clear . And bacteria Staphylococcus. Killed a broadly, who later found that these fungi is (Pennicillium family).