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.

Researchers at the University of Tübingen in Germany have new evidence suggesting crows can contemplate the number zero. This ability means the birds join an “elite” group of creatures that can ...

It’s easy to underestimate a honeybee. It weighs less than a paperclip and carries a brain with fewer than one million neurons. In comparison, the human brain has around 86 billion. By size alone, ...

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 ...