The Evolution of Civilization

As society got more advanced in this time, it seems we have less and less dependence on astronomy. We could not measure longitude until the second half of the 18th century. It's weird that on ancient maps copied from even more ancient source maps, there are precise longitudes. This is one of the things that suggests to me that a civil... The second thing is those maps show the world as it looked during the last ice age. And most important, they show Antarctica. Our civilization didn't discover Antarctica until 1820.