The concept of zero may seem easy to you, but many human societies struggled with the idea. However, some of the world's smartest animals understand zero, and now that group includes the honey bee.

A little brain can be surprisingly good at nothing. Honeybees are the first invertebrates to pass a test of recognizing where zero goes in numerical order, a new study finds. Even small children ...

Australian researchers have shown that bees can distinguish nothing from various positive numbers. Nigel Cattlin / Alamy As a mathematical concept, the idea of zero is relatively new in human ...