Due uccelli e i loro riflessi, a St Maries de la mer, in Camargue (Francia).
The feather of a peacock provides an example of dihedral symmetry of type D1.
Graphosoma lineatum, a bug that lives of juices sucked from plants. The photo puts in evid...
Dermal skeleton of a sea urchin. The photo sugggests a rough dihedral symmetry of type D5.
Calcareous techas of echinoderm made of a set of calcareous plates that form a kind of sti...
We easily recognize the outline of a swan, even if we see it in the dark or from a further...
A fossil of trilobite belonging to the genus Olenoides; an extinct sea animal that used to...
