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How does a 2x2 Rubik's Cube work?

This video reveals the internal mechanism of the 2x2 Rubik’s Cube: a central sphere with curved panels attached to one corner ...
NPR

The Rubik's cube is turning 50. This is how the iconic puzzle really works

The Rubik's Cube was created 50 years ago by Hungarian inventor Ernő Rubik. Over 500 million of them have been sold. Needless to say, the 3D puzzle has captured the imagination of countless students ...