1. A scientific discovery - The story of penicillin

2. At that time, bacterial infection killed many people. Dr. Fleming wanted to find cure for the diseases. Alexander Fleming (1881-1955)

3. A scientific discovery - The story of penicillin Dr. Fleming saw some moulds on a dish of bacteria... The moulds are killing the bacteria. One day in 1928...

4. A scientific discovery - The story of penicillin Dr. Fleming found that the mould produced a bacteria- killing chemical The moulds produce some chemicals. penicillin

5. A scientific discovery - The story of penicillin Two other scientists made the first penicillin drug. The drug can cure many diseases. In 1943... Florey and Chain

6. A scientific discovery - The story of penicillin Fleming, Florey and Chain received a Nobel Prize for their work. In 1945... What does this story tell us about scientific discoveries?

7. Observation by chance Sharp eyes Investigations Followed up by others Scientific discoveriesBuilding up scientific knowledge ++