Across
- 3. Robert Nevellis invented it in the 19th century. You love this invention!
- 5. Thomas Edison invented it in 1879.
- 6. It was discovered in the early Stone Age.
- 7. Karl Benz invented it in 1886.
- 9. Alexander Graham Bell invented this in 1876.
Down
- 1. Isaac Newton discovered it in 1666.
- 2. Martin Cooper invented this in 1973.
- 4. Thomas Savery invented it in 1712.
- 8. Joseph Priestly discovered this in 1774.