This mesmerizing sculpture is built of hinging wooden cubes

Great art is often interactive, and captivating design is frequently dynamic. Such is the case with Ghostcube, a beautifully conceived study in topological transfiguration created by Swedish designer Erik Åberg out of interconnected wooden cubes. » 2/27/14 10:40am 2/27/14 10:40am

Have you met the hexaflexagon? If not, it's high time you did.

Last week, YouTube's resident mathematical mind-blower, Vi Hart, introduced many of us to the topological wonder that is the hexaflexagon. If you haven't seen it yet, get your life in order and go check it out. In fact, even if you have seen it, go ahead and watch it again. Then reconvene with us here for round two of … » 10/08/12 8:20am 10/08/12 8:20am

The theorem that provides continuity for space, time, and airport maps

Ever seen the little 'You Are Here' dot on a map of the airport, or the mall, or any other structure? That's a demonstration of the Brouwer Fixed-Point Theorem. Violently shaken martini shakers and crumpled pieces of paper are also demonstrations. It's all over the place. Take a look at one of the weirdest, and most… » 1/07/12 1:00pm 1/07/12 1:00pm