In NUMBER@1 , PERSON@1 performed a series of experiments which demonstrated that organisms such as bacteria and fungi do not spontaneously appear in sterile , nutrient-rich media .

Yet it was not until NUMBER@1 that PERSON@1 performed a series of careful experiments . With these experiments , PERSON@2 proved that organisms such as bacteria and fungi do not appear in nutrient-rich media of their own accord in non-living material .
