Animal intelligence takes many forms and often defies human expectations. Some species solve problems, communicate complex ...

Albert Einstein was intrigued by a simple puzzle: an old car must travel 2 miles at an average of 30 mph. The twist? Its structure makes the solution impossible. Can you solve it?

Many of us like to think that we’re fairly smart. But it can be a very humbling experience when you’re in the presence of ...

I examine two widely loved businesses where expectations are high, but future returns may disappoint despite strong ...