The lack of wonder among the Chinese is especially remarkable in light of the fact that Chinese civilization far outdistanced Greek civilization technologically. The Chinese have been credited with the original or independent invention of irrigation systems, ink, porcelain, the magnetic compass, stirrups, the wheelbarrow, deep drilling, the Pascal triangle, pound locks on canals, fore-and-aft sailing, watertight compartments, the sternpost rudder, the paddle-wheel boat, quantitative cartography, immunization techniques, astronomical observations of novae, seismographs, and acoustics. Many of these technological achievements were in place at a time when Greece had virtually none.