25 Euro – Austria

A butterfly in red and green niobium with an atomic symbol above. Molecular chains extend from the silver ring, which features magnified details of the main motif. The ring also depicts, clockwise: a wing section, microscopic and electron microscope views, cell structures, and a cell nucleus.

A cell fragment stretches over the pill, starting with a radiation section, then a clockwise tetrahedral molecule, a full ray, and a bee. A hexagon on the right in a silver ring shows a membrane-covered virus. Clockwise from there are polioviruses, spiral-shaped spirules, and cocci (the latter two in hexes), a ray-beast, and cell division. Three hexes and molecules are also indicated.