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Across
  1. 2. events from the past
  2. 3. fall down suddenly
  3. 6. a person who studies science
  4. 8. strength or energy
  5. 11. go up something
  6. 12. very old
  7. 15. a system of trains and tracks
  8. 16. something unexpected
  9. 17. work that someone does
  10. 18. not easy to see
  11. 21. a place where something happens
  12. 24. a character with special powers who helps others
  13. 26. a living thing
  14. 27. a person who designs and builds things
Down
  1. 1. a trip from one place to another
  2. 4. the natural world of plants and animals
  3. 5. find something new
  4. 7. remains of plants or animals from long ago
  5. 9. an image taken by a camera
  6. 10. chance that things will happen well or badly
  7. 13. very surprising or impressive
  8. 14. make a hole in the ground
  9. 16. hard natural material used for building
  10. 19. ideas and traditions of people
  11. 20. join things together
  12. 21. free from danger
  13. 22. a large area full of trees
  14. 23. moving pictures recorded by a camera
  15. 25. keep someone or something safe
  16. 28. a person who protects a place