By the year 2016 NASA wants to create the coldest spot in the known Universe on board of the ISS in order to see how we can better understand matter and if we can obtain a new, revolutionary, understanding of the Universe. They will use a Cold Atom Lab in order to cool the atoms from inside to 100 picoKelvin, that means at 0.000000000001 K, basically 0 degrees Kelvin in practical terms.
The Cold Atom Lab will use a laser beam in order to cool the matter down. At that low temperatures they will obtain a Bose-Einstein condensate, a clump of matter that will behave like waves. You will be able to literally put matter over matter or atom over atom and they will occupy the same space, much like an electromagnetic wave is able to interfere and to be put over another one. Wow, that’s heavy!