http://news.bbc.co.uk/2/hi/science/nature/7512586.stm
A vast physics experiment built in a tunnel below the French-Swiss border is fast becoming one of the coolest places in the Universe.
The Large Hadron Collider is entering the final stages of being lowered to a temperature of 1.9 Kelvin (-271C; -456F) - colder than deep space.
The LHC has thousands of magnets which will be maintained in this frigid condition using liquid helium.
The magnets are arranged in a ring that runs for 27km through the giant tunnel...