Spontaneous generation
Scientists failed to accept the conclusions he reached. For example, Alexander Ross, a scientist who lived at the same time as Browne, wrote about it: "To question this (he meant: to question spontaneous generation) is to question reason, sense and experience.  If he doubts of this let him go to Egypt, and there he will find the fields swarming with mice, begot of the mud of Nylus, to the great calamity of the inhabitants."