"I ****ing love science" is a great page to "like", they have cool jokes and pictures and such.
Be careful about getting into 'discussions' on that page though. The people are a load of jerks... they thought I was an idiot for having an account for a cartoon/video game character. Not everybody wants to be themselves on Facebook you know!
In any case it's the friends I met online who get along with me better than the ones I knew in real life...