Objects with icosahedral symmetry occur in nature only at microscopic scales, including quasicrystals, many viruses and some beautiful protozoa in the radiolarian family (scientificamerican.com)
The researchers were able to show how five different kinds of proteins formed three different kinds of shapes: hexagons, pentagons and a stacked pair of hexagons, which assembled together into a 20 - sided icosahedral shell. (sciencedaily.com)
A negatively - charged C60 molecular ion can undergo a Jahn - Teller distortion by reshaping its molecular structure away from perfect icosahedral symmetry. (sciencedaily.com)