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Penicillin
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Fleming discovered penicillin
Fleming was cleaning up his desk one day and found a petri dish with some blue/green mold growing on it. He decided to look at it more detailed at it. Around the mold he found a growing bacteria and discovered that it was penicillin. Penicillin is actually an anti-biotic which is produced naturaly. -
Naming the anti-biotic penicillin
Fleming named his anti-biotic penicillin