Who discovered penicillin?

Penicillin was discovered by Alexander Fleming in 1928. This significant medical breakthrough occurred when Fleming noticed that the mold Penicillium notatum produced a substance that killed surrounding bacteria, which laid the foundation for the development of antibiotics. This discovery revolutionized medicine and has saved countless lives by effectively treating bacterial infections.

The other individuals mentioned made substantial contributions to science but in different areas. Marie Curie is renowned for her research on radioactivity, Louis Pasteur is famous for his work in microbiology and vaccination, particularly with pasteurization and rabies, and Isaac Newton is celebrated for his laws of motion and gravity in physics. Fleming's specific discovery of penicillin stands out as a landmark moment in the field of medicine.