Physics describes the Universe and how all things operate within it. From the tiniest subatomic particle to the gigantic ballet of planetary motion, it is physics that describes the interplay of matter. Nearly all of the atomic structure studied in chemistry classes today was proposed by physicists. This is because physics deals with the behavior of matter; it is the most basic of sciences. Born out of ancient philosophy and supported by mathematics, this challenging branch of science began with the simple question, “why?”