What earth do we live on?

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Tags

1. #unlike
2. #mantle
3. #understand
4. #onion
5. #earth
6. #layers
7. #chemical
8. #plastic
9. #physical
10. #crust
11. #speaking
12. #dissected
13. #generally
14. #outer
15. #properties
16. #influence
17. #layer