There are two kinds of matter in the universe. Dark matter and the matter we know and see now. Each takes up 50%. Some think dark matter makes up black holes. Who knows? I think science and all that stuff is pretty cool. Ohh and when matter and dark matter meet... interesting results. A possible movie to see what happens is "Angels and Demons".
Yup I have also read The Da Vinci Code and that other book (can't remember the name) by the same author. I think they are all good.