Текст песни В чём разница - между научным законом и теорией

sometimes you can hear in a conversation about an established scientific theory : " Well, it's just a theory ." However, discussions about scientific laws are rarely end with the phrase : " Well, it's just the law." Why is that? What is the difference between the theory and the law ? Is one better than another ? Matt Entikol explain why they need the same science for understanding the complete picture .