In many ways, ancient Asia was always far more advanced than Europe. There was bad science in Europe, like geocentrism. Asia has been more progressive in science. While Europeans used the periodic table to test medicines, the Chinese used herbs, acupuncture, and chi energy to heal people. Before the Europeans, the Chinese understood the link between sugar and diabetes. Although William Harvey is credited with this knowledge, Asians understood blood circulation long before Europeans. The Chinese also used willow bark, the plant from which aspirin is derived, to treat pain. Asians, especially the Chinese, were much more advanced and discovered many scientific revolutions before Europeans, although they are attributed to many scientific revolutions.