We are always solving problems, some of which have instantly obvious solutions and others that do not. In the latter case, the word puzzle comes to mind instead. A problem can be defined therefore as ...

Stephen has degrees in science (Physics major) and arts (English Literature and the History and Philosophy of Science), as well as a Graduate Diploma in Science Communication. Stephen has degrees in ...

One of the oldest logical paradoxes stems from a controversial figure in Greek history. Like most controversial figures, he was involved in a few lawsuits, and one in particular became known as The ...

These historical paradoxes don’t just confuse historians—they’ve puzzled philosophers, scientists, and thinkers for centuries. From ancient Greek thought experiments to modern scientific dilemmas, ...

Have you ever lain awake at 3 AM, staring at the ceiling, wrestling with a thought so profound it makes your brain hurt? These aren’t just ordinary philosophical puzzles or brain teasers — these are ...

Editor’s Note: Published in 1957, this article comes from Martin Gardner’s legendary Scientific American column Mathematical Games. Read more in our special digital issue, Fun and Games. A paradox is ...