The astrolabe was basically a map of the stars, you could use it to navigate by connecting what stars you see and what stars are on the astrolabe. It was also important for religious groups that built their religion off the stars!
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CO would be Carbon Monoxide
Well... Too many ordinary people owning stock
Social Darwinism<span> was a sociological theory popular in late nineteenth century europe and the United States. Maybe?</span>
