Answer:
relationship between blood flow and the heart rhythm and helped them discover how the heart works
Explanation:
its in the question
Some of the philosophers ideas may be a threat to Greek tradition because their logic is not exactly originate from the impulse of gods.
I wonder whether there would be also other options, but one very important aspect is the smog: the city center is where many industry-relevant things meet: the factories are all around it, transport, cars... and since it is surrounded by bad air, the air takes longer to dissipate. This is especially visible if the city is in a valley, such as Mexico city foe example.
