When you see repeating number sequences, you may think it's a coincidence. Perhaps it's your favorite number or you have a special memory associated with it. However, this is no coincidence! It's ...

Crows recently demonstrated an understanding of the concept of zero. It’s only the latest evidence of animals’ talents for numerical abstraction — which may still differ from our own grasp of numbers.

Around 2,500 years ago, Babylonian traders in Mesopotamia impressed two slanted wedges into clay tablets. The shapes represented a placeholder digit, squeezed between others, to distinguish numbers ...