I am also somewhat bemused by these ancient philosophers who were 'streets ahead' of Aristotle. Let's be careful here, most of Aristotle's output is lost, there are many errors in the work in terns of science, indeed as Hope has already noted the very idea of what science was is different. But the old Greek bugger is a monumentally important thinker whose work is crucial to what science now is, and many other disciplines. His writing that we at least know of was hugely diverse and influential and remains so.
I still see articles on a regular basis that effectively argue that we are only ever Platonists or Aristoteleans, and while I think that tends to be somewhat simplistic it does have some explanatory power. My knowledge of anciebnt Eastern thought is patchier than that of Greek philosophy but I've done what are sold as the highlights and I am not sure I would regard anyone as his equal, never mind 'streets ahead'. There is a tremendous amount to be taken from Eastern philosophy, and undoubtedly bits I have missed but we are talking about a specific thing on scientific 'rediscovery' here. The point I was making about Aristotle was not about what was being rediscovered but that the attitude to him in the Church actively held up progress in some ways