1: The Wheel - Invented around 3500 BC, the wheel is still used in transportation and machinery today.
2: The Alphabet - Dating back to 2000 BC, the alphabet is the basis of modern writing systems.
3: The Plow - First used in Mesopotamia in 3000 BC, the plow is still essential for agriculture.
4: Concrete - Ancient Romans used concrete in 300 BC, and it remains a key building material.
5: Compass - Invented by the Chinese in the 2nd century BC, the compass is still used for navigation.
6: Paper - Invented in China around 100 BC, paper is still widely used for writing and printing.
7: Gunpowder - Created by the Chinese in the 9th century, gunpowder is still used in firearms and fireworks.
8: Water Mill - Used by the Greeks in the 3rd century BC, water mills are still used for power generation.
9: Sundial - Dating back to ancient Egypt, sundials are still used for telling time using the sun's position.
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