A timeline from prehistory to modern days of advances in optics and related disciplines, and of the people responsible for them. The timeline is categorized into distinct spans of time, each accompanied by extensive information.

Ohio's history of human habitation goes back more than 12,000 years! Explore the prehistory in a logical fashion by clicking on the timeline and tracing people from Paleoindian, 13,000 BC to Historic Indians, 1650 AD. It's interesting to...