1. Gunpowder was discovered by the Chinese in different experiments.
2. The discovery of fire is considered a revolutionary even in history.
3. Electricity and the light bulb are discoveries used in everyday life.
4. Paper and pen were discovered a long time ago by Egyptians
5. Industry was revolutionized by the invention of the steam engine.
6. The first design of an airplane was made by Leonardo Da Vinci.
7. The first ariplane was developed by the Wright brothers in the US..
8. Millions of phone calls are made everyday using smartphones
9. This important invention is used by millions of people around the world, the internet.
10. Facebook is considered an important tool for communication.