Hi Everyone,

I'm new to the forum. This is my first post, so please forgive me if I make any newbie errors of etiquette.

I have two comments to make. The first is that I found Petrichor's posts very thought-provoking. The second is that I noticed some of you are tending to argue with each other in a personal way, rather than trying to work together to help our collective understanding.

I think that part of the difficulty with understanding curved spacetimes, or curved geometries generally, is that we have Euclidian geometry drummed in to us when we are young, and the local space around us seems Euclidian, so our minds are programmed to accept the Euclidian picture by default, and we have to make an extra effort to abandon that default position in order to picture and accept non-Euclidian geometry. Given that, if anyone is struggling to understand the concept of curved spacetimes then I would strongly endorse the advice given by another member to look at the many excellent resources elsewhere on the net.