Above the generations, the credentials desired to have out scientific exploration have been in flux. Only lately has science grow to be an profession. In before times, science was a thing for individuals with the luxury to devote their leisure time or spiritual time to observe their curiosity.
In the 1600s, Antonie van Leeuwenhoek found microorganisms. His professional qualifications? A fabric service provider who acquired to make great lenses to choose the weave of materials. At some point, he created lenses much more highly effective than microscopes at that time, which allowed him to curiously analyze mucky pond drinking water