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========== 10) The Great Wall of China is the only man-made
object visible from space.To see something on Earth from space, it would
have to be pretty big, which the great wallof China all 5,000 miles of it certainly is.
But, it’s only 30 feet across at its widest.Here’s a photo taken from the International
Space station, 200 miles above Earth. Canyou spot the great wall amid the mountain
tops?Here, right? No, that’s a river, the wall
is actually here. Even if you guessed theright lines buy pure luck, this photo was
taken with a zoom lens, so from the windowof the space station it looks more like this
– which pretty clearly makes the Great Wallcount as ‘not visible.’
As for the man-made part of this misconceptionour glorious man-made cities blasting light
into the void...