Know When You Are, Not Where You Are || The Great Mystery of Navigation
It's hard to get lost today, even in a new location, because we have great navigation in all our gadgets, but how on Earth did people use to find their way centuries ago? Determining one’s latitude is pretty easy, as Polynesians were among the first to discover it in the year 400 CE. Now we get to the tricky part: how to determine your longitude on a planet that is constantly spinning. In Antiquity and the Middle Ages, it was common practice to measure distance in time rather than in mileage. Marco Polo, for example, gave the size of lands he traveled on the Silk Road in days, not miles…
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