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Today in history: Alexander Fleming discovers penicillin

4 verified updates • corroborated by 2 independent sources • tracked since September 28, 2026

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  04:00 AM 1 source: bostonglobe.com

  Today in history: Alexander Fleming discovers penicillin
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  04:30 AM 1 source: The Boston Globe
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  05:30 AM 1 source: bostonglobe.com
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  06:00 AM 1 source: The Boston Globe