The New Year often comes with new resolutions! I hereby decide to re-open this blog that I more or less abandoned at the end of 2009, with only one major change, a language switch from French to English! Indeed, many colleagues, friends, relatives, and in particular people potentially interested in what I would have to say did not always bother learning French. I will likely regret this choice at some point because I love writing in French, but the the audience beat the language this time! The archive of the old French blog will remain accessible there: http://oldmissingcluster.wordpress.com! I will also append progressively some pages about my ongoing projects, collaborations, and also about chaetognaths, my favourite animals progressively, in the purpose to make this site reflect more of my personal scientific and intellectual activity! So, keep track of it!!