THE EXPERIMENT OF FRANCISCO REDI

The first scientist who demonstrated with a experiment the falsity of the theory of the spontaneous generation was the Italian Francisco Redi (1626-1698)
In his book "Experiences around the generation of the bugs", Francisco Redi wrote:
" I put in four flasks with wide mouths asneak, some river fishes, four small eels from Arno river and a piece of calf; I locked very well the mouths of the flasks with paper and strings. Afterward I placed in other four flasks the same things and left their mouths open.
Short time later the meat and the fishes inside the open flasks became verminous, and after three weeks I saw many flies around these flasks, but in the locked ones I've never seen a worm ".

School site Aristotle Redi Spallanzani Metamorphosis Microorganisms "The tiny animals"