The Bigs

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Across
  1. 5. Tallest land animal to ever exist
  2. 6. Tallest building in the world
  3. 10. Longest living organism on earth (extant)
  4. 11. Most numerous insect in the world (extant)
  5. 12. Largest bird to ever exist
  6. 13. Most popular book of all time
  7. 14. Largest extant reptile
Down
  1. 1. Largest star in the universe
  2. 2. Tallest human man ever
  3. 3. Largest land mass to have ever existed
  4. 4. Largest ocean in the world
  5. 7. Largest animal to ever live
  6. 8. Tallest tree in the world (extant)
  7. 9. Largest human gathering in the world
  8. 13. Largest vehicle in the world