Looking for a cool gift for someone mathematically inclined? An unusual, conversation-generating token of appreciation? The World Wide Web offers a number of intriguing possibilities–if you know where ...

This Escher-looking structure is the Klein Bottle. It exists only in four dimensions, has only one surface, and contains itself. See what happens when the Möbius Strip turns to drink. Many people have ...

Ever since I became interested in math, I’ve always wanted a Klein bottle. It therefore comes as no surprise that ever since receiving one, I’ve been completely enthralled with it. I stare at it every ...

The Klein Bottle is a 4D mathematical oddity. We test a 3D model to see how its non-orientable surface behaves when filled with liquid. Explore topology and why this shape has no 'inside' or 'outside' ...

A wildly impractical but totally beautiful 'two-dimensional' wine bottle has be launched for sale. The Klein bottle was first conceived of in 1882 by German mathematician Felix Klein. Its mind-bending ...

Health. Stress alert: the time in life when it is most dangerous for the body according to experts Health. The best tricks to get rid of belly fat before summer, according to a personal trainer ...