Additionally, theories are just that, theories - not laws (natural laws, e.g., the Ideal Gas Law). Theories change, laws do not. Many sceintific theories have changed over the years. The catalyst for change of many of these theories was observation of actual data or phemenona. Thank goodness for that (the ability of theories to change) or the world would still be flat, our solar system would revolve around the earth, the atom would be the smallest constituent of matter......