Zero is just 1,500 years old. Before it, there was nothing.


a close-up of a combination lock, with the numbers 90 and 0 visible
Science

How humans invented zero—and why some tried desperately to do without it.

Life without zero is unimaginable. But the concept is only 1,500 years old.
via Popular Science "http://bit.ly/2sb0iIP"

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