How long did it take Einstein to develop the theory of relativity?

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Tags

1. #theory
2. #determined
3. #relativity
4. #cause
5. #distortion
6. #acceleration
7. #objects
8. #space
9. #general
10. #which
11. #spent
12. #published
13. #gravity
14. #include
15. #massive
16. #trying
17. #years
18. #einstein