The timeline of historic inventions is a chronological list of particularly significant technological inventions and their inventors, where known. This page lists non-incremental inventions that are widely recognized by reliable sources as having had a direct impact on the course of history that was profound, global, and enduring. The dates in this article make frequent use of the units mya and kya, which refer to millions and thousands of years ago, respectively. Paleolithic The dates listed in this section refer to the earliest evidence of an invention found and dated by archaeologists (or in a few cases, suggested by indirect evidence). Dates are often approximate and change as more research is done, reported and seen. Older examples of any given technology are often found. The locations listed are for the site where the earliest solid evidence has been found, but especially for the earlier inventions, there is little certainty how close that may be to where the invention took place. Lower Paleolithic The Lower Paleolithic period lasted over...