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/u/thirdworldguy's
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2013
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How and when were all the clocks (time) around the world synced?
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How was it established by humans that the earth is round and a planet? Also how was it known that the twinkling objects in the night sky are actually stars and planets just like earth?
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How and when were all the clocks (time) around the world synced?
1452
--
10
9
8
7
6
5
4
3
2
1
0
How was it established by humans that the earth is round and a planet? Also how was it known that the twinkling objects in the night sky are actually stars and planets just like earth?
2
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10
9
8
7
6
5
4
3
2
1
0
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