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The Origin of Zero | Scientific American
Who Invented the Zero? | HISTORY
What is the origin of zero? How did we indicate nothingness ...
The Origins of the Zero | Encyclopedia.com
The Origin of the Number Zero | Smithsonian
The Elusive Origin of Zero | Scientific American
The History of Zero | YaleGlobal Online - Yale University
Earliest recorded use of zero is centuries older than first thought
Ancient Text Reveals New Clues to the Origin of Zero
Nothing matters: how the invention of zero helped create ...