> what happened 800 years ago that all that science just vanished?" To me it has always seemed like this was simply a side effect of Islam taking deep root. B

> what happened 800 years ago that all that science just vanished?" To me it has always seemed like this was simply a side effect of Islam taking deep root. Before this the older, pre-Islamic culture was still there, but as time passed Islam, as evidenced by the conservative Islam we see today, took hold leading the Islamic territories away from math and science.