Can you drill a hole in a cube that an identical cube could fall through? Prince Rupert of the Rhine first asked this ...

To see how one cube can pass through another, imagine holding a cube over a table and examining its shadow (assuming it’s ...

Rubik's Cube, a multicolored three-dimensional puzzle, lost a trademark battle Thursday after Europe's top court ruled its shape was not sufficient to grant it protection against copycats. The toy, ...