honeybees

The controversial herbicide Roundup has been accused of causing cancer in humans and now scientists in Texas argue that the world's most popular weed killer could be partly responsible for killing off bee populations around the world.

Honeybees understand that "nothing" can be "something" that has numerical meaning, showing that they have a primitive grasp of the concept of zero.

That's according to a newly published study in Science, which shows that bees possess a mathematical ability once thought to exist only in dolphins, primates, birds and humans who are beyond the preschool years.