1. Almost 100,000 People Have Tried And Failed To Get All These Super Simple Math Questions Right, So You're A Genius If You ...

But a sense of quantity, sometimes called "numerosity," appears across a surprising range of species. So, which animals can count and understand simple math?

But this simple example shows that there are purely mathematical reasons behind this kind of intransitivity, too. And this purely mathematical consideration has something in common with the real-world ...