Francesco Redi was an Italian physician, naturalist, physiologist, and writer. He was the first man to prove tht the Spontaneous generation was wrong.
In his experiment, he put on three jars a pice of meat, and covered them using different materials. The first jar didn't have a covering, the second one was sealed and the third one was covered using cloth netting.
With this experiment, he proved that rotting meat didn't produce maggots.