Prehistoric times

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Across
  1. 4. a place where water from a river or stream falls down over a cliff or rock
  2. 5. A place you see discoveries
  3. 7. a fact or thing that someone finds out about
Down
  1. 1. to move a small light boat through water,
  2. 2. a container with a narrow top for keeping liquids in
  3. 3. you use for protection
  4. 6. a strong hard hat