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what did Obama invent
All the digits! Muhammad ibn Musa al-Khwarizmi gave the West all of the Hindu digits and much more besides. Please see the link.
they invent cheese
He didn't invent it. He didn't invent anything.
Why did Ian Donald Invent The ultrasound machine and why did he invent it
you can invent if you really want you can invent by things that are not expensive..right?
Roberts helped to invent the microwave, but did not invent it by himself.
because it was fun to invent
a bail
they didnt invent anything
No, but they did invent paper!