September 3rd 1928 How a cold day and an open window changed medicine for ever with a wonder drug.
On a cool day Scottish bacteriologist Alexander Fleming returns from holiday to discover piles of culture dishes with bacteria lying around, he left a window open in his lab, he notices that one of the dishes is contaminated with a greenish yellow mould . Fleming then notices that between the mould and the bacteria is a clear halo where the bacteria had not grown.
In a eureka moment he realises that the mould must be releasing a substance that is stoping the growth of the bacteria. Fleming names the active ingredient of his mould 'Penicillin' after the Penicillium notatum mould from which it comes.