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?

Light has always been the stage on which quantum mechanics performs its strangest tricks, and the double-slit experiment is ...

Is artificial intelligence replacing human genius in mathematics, or redefining it? From the Navier-Stokes mystery to ...

This brain teaser challenges readers to locate an inverted '64' hidden among a series of '94's within a strict 7-second time limit.

For more than a century, gravity has been the stubborn outlier in physics, resisting every attempt to merge Einstein’s smooth space-time with the jittery world of quantum mechanics. A new wave of ...

Every week, Space.com delivers the latest discoveries, launches, and cosmic curiosities from across the universe. From ...

If you're keen to shake off the mental fog that's settled in since Christmas, this riddle could be just what you need. Brainteasers serve as brilliant tools for jump-starting your brain and getting ...

Solve the Crosswords, Connections, Strands and other puzzles that the Games team can’t stop thinking about. By New York Times Games Every day of the year, New York Times Games publishes a handmade ...

The Long and Winding Road (Saturday Variety Puzzle, July 19) The Long and Winding Road (Saturday Variety Puzzle, July 19) The Journal Acrostic (Saturday Variety Puzzle, July 12) The Journal Acrostic ...

Do you think you've got decent science knowledge? It's time to put your gray matter to the test with our weekly, free science crossword puzzle. We've spent hours carefully writing our puzzles to make ...

The New York Times looks for intelligent, literate, entertaining and well-crafted crosswords that appeal to the broad range of Times solvers. Submissions are open. A New York Times crossword will be a ...