How many Earths are there in DC Universe?

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Tags

1. #antimatter
2. #multiverse
3. #earth
4. #universes
5. #called
6. #matter
7. #positive
8. #three
9. #resembled
10. #limbo
11. #universe
12. #still
13. #occurred
14. #original
15. #continuity
16. #consisted
17. #earths
18. #respectively