Why pondering about the invisible reality

My personal try at a three-minute video along the lines of FameLab (www.famelab.org). FameLab is a sort of "American Idol" for scientists: it consists in a contest based on science communication where participants are young researchers, such as grad students and postdocs, and have three minutes to present an item of their research with nothing but props (no slides!). This video is an exercise in that direction.