The origins of the universe

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Across
  1. 2. Likes to chase mice
  2. 4. a heavenly being
  3. 8. upgrading
  4. 9. where we live
  5. 10. what someone thinks
Down
  1. 1. Large marsupial
  2. 3. a theory
  3. 5. Man's best friend
  4. 6. Flying mammal
  5. 7. Has a trunk