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31 votes
31 votes
What happened in the middle of the twentieth century that will not happen again for 4,000 years?

User Stephen Walcher
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2 Answers

19 votes
19 votes
I agree 6009 which is the same upside down
User Nagendra Varma
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2.5k points
18 votes
18 votes
A year like 1961, which reads the same up-side-down. This will not happen again until 6009.
User Beastieboy
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3.0k points