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Was perusing through old threads and stumbled across this goldie: Roman India
Basic idea being that Romans had quite the presence on the west coast of India. Had that developed into some sort of trade/cultural-colony, how might things have developed with a Roman-ized state in Western India?
Rather than necro-ing the thread on the subject of the Romans adopting Arabic-Hindu numerals, I wanted to throw it out there and ask what other aspects of Hindu science might have made it back to the Roman Empire? Certainly nothing life-saving, but definitely enough to rock the boat significantly.
What would have made it's way back to Europe, and how would it have changed things?