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Is Earth Actually Flat?
Key Facts In This Video
If the Earth was a flat disk, approaching the edge would feel like climbing a hill that becomes gradually steeper. 00:44
Modern "Flat-Earthers" believe that the Earth is flat, and that photographs taken from space are all elaborate hoaxes. 05:04
To a cosmic ray proton traveling at nearly the speed of light, Earth appears to be a mere 56 feet (17 meters) thick. 07:50