From the Encyclopedia of Ancient Natural Scientists: The Greek Tradition and its Many Heirs. It’s a pretty awesome book, including something like 2,000 ancient natural scientists – obviously using a pretty loose definition of ‘natural scientist’. But they come up with these awesome graphs showing the rise and fall of the ancient natural scientists.
Because many of them had less certain date ranges, they spit them into two graphs, the ‘narrow-range’ with well known dates, and ‘wide-range’ for those whose dates were less exact.
The Antikythera Mechanism: