Who had the most contributions to science in Western Civilization( Ancient Greece, Ancient Egypt, Roman Empire, Hebrews)?
Rome made almost no contributions to science. They made quite a few advances in technology, though. I can’t recall too many advances claimed by the Hebrews. Between the ancient Greeks and the ancient Egyptians, it’s a tough contest. There is no doubt that both civilizations advanced mathematics, astronomy, and engineering tremendously. Quite a few of the advances attributed to Egypt took place during the reign of the Ptolemies, though, and I am not sure those should properly be considered ancient Egyptian. So I am going to go with Greece. Honorable mention to the Islamic world during the Middle Ages.
