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

User Dry
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2 Answers

4 votes
I agree 6009 which is the same upside down
User Snazzybouche
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1 vote
A year like 1961, which reads the same up-side-down. This will not happen again until 6009.
User Shivam Bharadwaj
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4.7k points