We all have a problem-solving toolkit in our heads. But sometimes, you may come across a brain teaser that stumps you. In this case, it helps to look at it from a different angle instead of going ...

There are riddles, and then there are riddles. Lateral-thinking puzzles fall into the latter category. Among the trickiest riddles out there, these brain games will give your noggin a serious workout.

Imagine standing at the crossroads of the present, peering into the fog that shrouds the future. This is the metaphorical landscape Heinz von Foerster painted back in 1971, as he pondered the complex ...