Who established biogenesis?

Biogenesis, the principle that living organisms arise from pre-existing life, was primarily established through the experiments of Louis Pasteur in the 19th century. His work disproved the theory of spontaneous generation by demonstrating that microorganisms in the air were responsible for contamination in sterilized environments. Pasteur's experiments, along with those of others like Francesco Redi, laid the foundation for modern microbiology and our understanding of the origin of life.