bob i don't know look in a dictionary
hoho
The Ancient Romans.
Concrete was the invention that made building better and stronger.
Concrete and the invention by Rome of the arch.
the invention the could change the world would be the teleporter
An aqueduct. Though, I have a problem calling it a Roman invention. Aztecs also had very sophisticated aqueducts in Tenochitlan.
The most dramatic change in agriculture in the South was the invention of the cotton gin.
the recurve bow
the ipod is a great invention
they
The invention of the Firearm
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