In 1928, Alexander Fleming found something strange: bacteria dying around a patch of mold. That mold became penicillin the world’s first antibiotic. With help from Florey and Chain, it became mass-producible by 1945. Fleming’s discovery has saved millions of lives and his warning about resistance still rings true today. | Lost in History

#Onthisday 1955: Sir Alexander Fleming described how he discovered penicillin by chance and discussed his hopes for future scientific and medical breakthroughs. Two months after he showed Panorama viewers his original cultivation that went on to save many millions of lives, he died at the age of 73. | BBC Archive