Until they actually observe and capture some of this alleged "dark matter," I will regard it with the same skepticism that I do God. In fact, it's exactly like God: invisible, undetectable, can't see it or touch it or interact with it, yet people insist that it HAS to be out there somewhere because of all the things that happen that they don't understand. There are currently 118 elements in the Period Table. Which of them is supposed to comprise "dark matter?" Scientists should consider that they might be misinterpreting the data. At one time, we thought there were canals on Mars, and they turned out to be an illusion.