Can Superman only die from kryptonite?

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Tags

1. #panel
2. #prevailing
3. #kryptonite
4. #without
5. #radiation
6. #makes
7. #superman
8. #weakens
9. #eventually
10. #solar
11. #absorption
12. #geekdom
13. #theory
14. #because
15. #energy
16. #disrupts