Low temperature on a large scale. The 27-kilometre underground ring at CERN is now being equipped with new technology for CERN's next major physics machine, the Large Hadron Collider (LHC). The LHC will use superconducting magnets cooled by superfluid helium at 1.9 degrees above absolute zero, making it the coldest locality in the world, and even the Universe. The cover shows an artist's impression of a temperature map representing the LHC ring superimposed on an aerial view of the terrain around CERN.