Most physics students first learn Noether’s theorem in a quantum field theory class, but there is an easier analogue in classical mechanics. The first article deals with this. The second article, which assumes the knowledge of Lagrangian mechanics, time dilation, and the article ”By how much does time go more slowly at a lower place?” listed in “Some basic ideas in General Relativity,” shows how general relativity can be reduced to Newtonian gravity in a certain limit.