Superconductor research on calendar
When the Americal Physical Society made their 2012 calendar, they picked a picture from the University of Oslo.
The picture shows what happens in a superconducting film when it is exposed to a magnetic field.
The bush-like structures show how the magnetic field penetrates the film, destroying it's superconducting characteristics.
The illustration originates from an article in Physical Review B.
More pictures, and movies, of magnetic flux avalanches on our pages on superconductivity.