I find such discussions very confusing. Are we talking about science in civ‘s understanding or real world?Really, from the beginning of history to 1500, not so much. Greek science was based almost entirely on Babylonian (and to a lesser extent Egyptian) science (though the Greeks made some important contributions in the field of mathematics). Roman science was based almost entirely on Greek science. That being said, the Romans and their successors were marvelous engineers; the Middle Ages saw a boom of practically applied science--but that perhaps better reflects industrial bonuses than science bonuses.
In the real world, the Greeks contributed greatly to Philosophy, Astronomy, and Mathematics - and this (and its various disciplines) is pretty much the extent sciences had before the 800s (well, maybe geography as well). I don‘t see any contemporary or later civ in the time frame 500 BCE - 800 CE to be at a similar level in contribution to science. Especially as several technologically advanced societies seemingly did not care for science at all in pre-modern times (e.g., in East Asia). I‘m sure we both read some Egyptian, Babylonian and Greek texts that deal with science or philosophy and noted the difference in analytical precision and thought between these. Is the ancient influence on Greek thinkers often ignored in the west? Sure! Is this enough to marginalize how much changed with them? For sure not.