Hi, I was wondering if somebody could tell me in what way the following paragraph is incorrect (if it is). Thanks. According to Einstein’s theory, when radio waves travel from one place to another, and both places have a different time flow, the frequency will appear to change. When measured, the frequency of Cosmic Background Radiation appears to be lower, since the flow of time on earth is faster than it was soon after the big bang. Time flows faster on earth, because earth has such little gravity, and soon after the big bang the whole universe was packed into such a relatively small area, making for an enormous amount of gravity. The difference in gravity causes a difference in the flow of time.