c. 150
Science
Egypt
Ptolemy's Almagest and Geography
Ptolemy combined geometry, observation and coordinates into models of sky and earth.
Why it mattered
Framed astronomy and mapmaking until Copernicus.
Antiquity
150
2 recorded milestones at this point in the record.
c. 150
Medicine
Roman Empire
Galen's anatomy and physiology
Dissection and experiment produced a medical system that lasted 1,400 years.
Why it mattered
Dominant framework of Western and Islamic medicine.
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