http://www.theregister.co.uk/2011/08...first_results/
Oooops, they were not funded to find this.
Of course, almost any physicist who has looked at particle tracks in
cloud chambers would have known this was true decades ago. Cosmic
rays are the main source of "noise" in cloud chambers. Even worse,
charging not only nucleates vapor droplets but stabilizes them against
evaporation as has long been known, a phenomena known over a hundred
years ago.