Osmium's big claim to fame for being the densest of all elements is a title sitting on shaky ground. Rutherfordium is, in theory at least, nearly a gram denser per cubic centimeter if calculations are correct. Trouble is, a cubic centimeter's worth of Rf to do such a comparison is not likely to ever become a reality. Only a few atoms of this element have been concocted so far so we're at least a few hundred trillion atoms short of that little cube. And if somehow such an amount were possible to make it, it and a city-sized chunk of the earth would vaporize within a few microseconds which would inevitably leave Earth's survivors with lingering doubts. Heh.

After Mendeleev, Rutherford is perhaps the most deserving person to be named after an element. Among his lengthy list of academic accolades, he shed light on the nature of atoms and the concept of a half-life in radioactivity.

This cube is a small honor to a very eminent scientist who, unfortunately, today lives in the shadows of his better-known colleagues Niehls Bohr, Einstein and the Curies (all of whom, ironically, had elements named after them before him!)