In1928,a scottish scientish named alexander fleming was researching a kind of bacteria call staphylococcus.
He conducted experiment with the bacteria in dishes
Fleming was brilliant,but he was messy and absent-minded
When he left his laboratory to go on vacation,instead of cleaning up,he left the bacteria in the dishes
When he returned,he noticed that mold had grown in the dishes while he was gone
He could have just thrown the dishes away
Fortunately,instead,he look at them under a microscope
Fleming found that the area around the mold qas free of bacteria
He realized that the dangerous bacteria must have been dissolved by the mold
These dirty dishes led to the discovery of penicilin,the first antibiotic
Today,this life-saving drug is used around the world
Each year there are over 80 million prescriptions written for penicillin in the u.s. alone