Even within Europe, there was significant scientific progress during said dark ages. It’s extremely obvious by just looking at a 9th century building to those from the 14th century (especially churches). The latter require profund knowledge of mathematics/civil engineering. We went from tiny windows in 2m thick brick walls to vast, airy Gothic cathedrals (although those did take a couple of centuries to actually finish).
Although to be fair, that knowledge did largely come to Europe from the scholars of the Arabic world.
Even within Europe, there was significant scientific progress during said dark ages. It’s extremely obvious by just looking at a 9th century building to those from the 14th century (especially churches). The latter require profund knowledge of mathematics/civil engineering. We went from tiny windows in 2m thick brick walls to vast, airy Gothic cathedrals (although those did take a couple of centuries to actually finish).
Although to be fair, that knowledge did largely come to Europe from the scholars of the Arabic world.