Did Einstein fully disprove Newtonian physics? In school, we are taught Newtonian physics using Newton's laws of gravity, acceleration, etc. Are these applicable in astrophysics, or did Einstein fully disprove them to be false on a larger scale? If so, why does the educational system continue to preach them? My Biology teacher recently told me that matter cannot be created or destroyed and is sperate from energy. When I asked about E = MCC, she said something along the lines of, "Only Einstein understood that.". Later, she could not answer a student who asked what a lightyear was... thank god she teaches bio... Point being, my opinion of the current educational system is quite low... which is why I'm asking this in the 1st place... when I learn Newtonian physics, should I memorize them for life and defend them to the death, or just go for the A in the class?