What is the softest thing in the world?

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Tags

  1. #composed
  2. #mineral
  3. #measure
  4. #hardness
  5. #softest
  6. #weakly
  7. #terms
  8. #metals
  9. #stack
  10. #known
  11. #sheets
  12. #pressure
  13. #comes
  14. #scientists
  15. #under
  16. #apart
  17. #connected
  18. #according
  19. #soapstone
  20. #absolute
  21. #scale