Human Evolution Crossword Puzzle

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Across
  1. 3. Humans who discovered the use of fire
  2. 4. Modern humans
  3. 5. Humans who made simple stone tools
  4. 7. The first material used by early humans to make tools
Down
  1. 1. An early ape-like ancestor
  2. 2. Early humans who walked upright
  3. 5. Early humans depended mainly on this activity for food
  4. 6. Early humans lived in these natural shelters