Quick Take The Audubon Christmas Bird Count helps conservationists and scientists understand how many birds are in any given ...

UCSD cognitive scientist Rafael Nunez, seen from the back, conducts a counting experiment with the resident of a village in Papua New Guinea in this undated photograph. Sign on to any news website and ...

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.