What is the dark side?

  • Michael Hanlon
Part of the Macmillan Science book series (MACSCI)


In late 2005 I was privileged to gaze upon one of the marvels of the modern world. Buried around 30 metres under the Swiss-French border, near Geneva, is a roughly circular tunnel, about 27 kilometres long. The tunnel is lined in grey concrete, with a painted floor, and is about three metres across. It makes a nice, if somewhat dispiriting, running track, the wall curving endlessly and rather hellishly away in both directions as you puff your way around. In fact, informal races have been held in it; a good time for a circuit is two hours. A more common means of transportation would be a bicycle or one of those two-wheeled electric buggies. I was lucky to get into this tunnel, because from now on and for a good while no one else will be going down there.


Dark Matter Dark Energy Large Hadron Collider Radio Galaxy Dark Side 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. 1.
    Massey, R. (2007) Dark matter mapped. Nature, Online edition, 7 January.Google Scholar
  2. 2.
    Conselice, C. (2007) The Universe’s invisible hand. Scientific American, February,

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© Michael Hanlon 2007

Authors and Affiliations

  • Michael Hanlon

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