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Innovations from the Greco-Roman era

What are 2 great advances from the Greco-Roman era. Why those advances are significant?

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First of all, an astronomer by the name of Claudius Ptolemy managed to map over 1000 stars and put together a list of about 48 constellations. This enabled him to visualize and describe the longitude and latitude lines of the earth. This "advance" was significant since it was the first ...

Solution Summary

This solution examines two advances, or innovations, from the Greco-Roman era, and explains why they were significant.