I recall reading where there is some archaeological evidence to suggest that underfloor heating originated in the Indus Valley in the 6th millenia, BC. It spread to Rome thus continuing the Roman's trend of adapting and perfecting technology discovered by others. The Romans were not great innovators but they were extraordinary engineers.
In any case....if an idea could spread westward it could also spread eastward.
Something is wrong here. War, disease, death, destruction, hunger, filth, poverty, torture, crime, corruption, and the Ice Capades. Something is definitely wrong. This is not good work. If this is the best God can do, I am not impressed.
-- George Carlin