Answer:
Hellenistic culture produced seats of learning in Alexandria, Egypt and Antioch, Syria, along with Greek-speaking populations across several monarchies. Hellenistic science differed from Greek science in at least two ways. First, it benefited from the cross-fertilization of Greek ideas with those that had developed in the larger Hellenistic world. Secondly, to some extent, it was supported by royal patrons in the kingdoms founded by Alexander’s successors.
Especially important to Hellenistic science was the city of Alexandria in Egypt, which became a major center of scientific research in the 3rd century BCE. Two institutions established there during the reigns of Ptolemy I Soter (reigned 323-283 BCE) and Ptolemy II Philadelphus (reigned 281-246 BCE) were the Library and the Museum. Unlike Plato’s Academy and Aristotle’s Lyceum, these institutions were officially supported by the Ptolemies, although the extent of patronage could be precarious, depending on the policies of the current ruler.