"Coalesce"

I was reading an article I found on Yahoo site about Higgs Boson, and I stumbled upon this interesting word.

And the quote of the day comes from moi: It is hardest being generous when one is broke.

That's why I thought since I've got no money to contribute to the dire economies around the world today, I'd partake with a bit of knowledge instead. Click here to see if you can figure out why the word coalesce was used in the article - instead of regular words like 'unite' or 'join' or 'blend'.