There’s nothing quite like a maddening math problem, mind-bending optical illusion, or twisty logic puzzle to halt all productivity in the Popular Mechanics office. We’re curious people by nature, but ...

If you have six equally spaced points on a circle and join three of them, you can make three different triangles. (Two triangles are counted as the same if one is a mirror image or rotation of the ...

Fallen Triangle can be a tricky yoga pose. Your legs turn away from your body in opposite directions. Your front hamstring is stretched beyond what may seem reasonable. Your core muscles--including ...