Friends: I have been studying John Moffats Modified Gravity theory. I find it very interesting and I agree with him in that I think Dark Matter and Dark Energy are merely mediums to make our current equations work so we can predict the movements of the cosmos. However I am unclear on what modified gravity means to black holes, gravitational waves, and especially confused about how modified gravity explains the beginning point in time and space and the age of the universe. I am hoping someone here read his book and made more sense of it than I did. Or can it be that some of these things are yet to be explained under that model?