So, why do people in the 21st century sometimes have almost medieval delusions? In their lifetime they have seen sheep cloned and people launched into space on rockets. Finally, there is enough knowledge available to school children about the Age of Discovery (even if you skipped your astronomy lessons). He did not empirically (empirical = obtained through experience) confirm that the Earth is spherical, as it turns out to be! Today, people don't have to go on a dangerous trip around the world to prove this - we have photos from space, eyewitness testimonies, astronauts, and astronomical data at our service. And Columbus set sail for India but found himself in America. It seems that Galileo (or was it Giordano Bruno?) said that the Earth revolves around the Sun. A lot of mixed up, and often confusing, knowledge about how our world works is stored in a person's head.
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