1920s Technology and Science

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Across
  1. 4. Person who found that the universe is expanding
  2. 5. Used to treat bacterial infections
  3. 6. Invented the assembly line
Down
  1. 1. Explanation for the beginning of the universe
  2. 2. Discovered by Alexander Fleming
  3. 3. Person who found that the universe began from a single point
  4. 7. Inventor of the first Band-Aid