Dude science is trial and error, experimentation and observation. It doesn't require lab coats and beakers. We are all scientists on one level or another. Who ever was doing the trial and error (spelled experimentation) on the first wheel was a scientist like it or not.
They weren't professional scientists and didn't have a degree, or lab coat. There were "scientists" at Stonehenge and building pyramids. Written language probably was less "scientific" but all advances were basically by "scientists", in whatever low tech existed at that time.