A very easy easy easy easy easy IMPOSSIBLE comedic history crossword

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Across
  1. 3. Time before biblical flood
  2. 5. monkey TRANSFORM
  3. 6. Uniform
  4. 8. Metal
  5. 10. very, very, very, very, very, very, very, very, very, very, very, very, very, very, VERY old
Down
  1. 1. Praying for forgiveness
  2. 2. Buo
  3. 4. Old family member
  4. 7. ban
  5. 9. Large... boat