Inventions in May

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Across
  1. 2. Made the invisible impossible to ignore.
  2. 5. Keeps food fresh by doing the opposite of heating.
  3. 8. Bell’s breakthrough that turned voices into long‑distance signals.
  4. 9. This invention stitched together the Industrial Revolution.
Down
  1. 1. From room‑sized calculators to pocket-sized brains.
  2. 3. Edison didn’t invent it first—but his version lit the world.
  3. 4. Mass‑produced ideas long before the internet existed.
  4. 6. The Wright brothers proved gravity could be negotiated.
  5. 7. Wireless invention that spoke before television could show.