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  1. Maverick giant of chemistry; formulated valence bond theory and electronegativity; founded the fields of quantum chemistry, molecular biology, and molecular genetics. Discovered the alpha-helix structure of proteins; proved that sickle-cell anemia is a molecular disease.

  2. Sep 11, 2020 · 1665 – Francesco Redi demonstrates that maggots are the larval stage of flies with an experiment that helped to disprove the spontaneous generation theory which had held sway since ancient times ...

  3. The belief that life forms can occur spontaneously (generatio spontanea) is contradicted by Louis Pasteur (18221895) (although Francesco Redi had performed an experiment in 1668 that suggested the same conclusion). 1855: Rudolf Virchow states that cells always emerge from cell divisions (omnis cellula ex cellula).

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