Toupees do it.
Even twists of DNA do it. In the 5 February issue of Physical Review Letters , a team of researchers reports observations of rapidly spinning nuclei morphing into mirror-image forms. In the process, the physicists also uncovered solid evidence that a long-disputed type of nuclear symmetry really does exist. The discovery springs from work by nuclear theorist Stefan Frauendorf of the University of Notre Dame in Indiana, who was exploring a hypothetical property of atomic nuclei called triaxial symmetry. It describes a possible arrangement of neutrons and protons that would cause the nucleus to be oblong, sort of like a kiwi fruit.