IN THE SPACE

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Across
  1. 1. They give energy.
  2. 4. It works in the space.
  3. 6. A thing in a lab.
  4. 7. He works in a lab.
Down
  1. 2. It can fly.
  2. 3. It doesn't work.
  3. 5. It was invented in the neolithic period.
  4. 6. You can put them on a pizza.