Some scientists are now saying that the universe is eternal, that it has always existed even before the big bang. Universe in its present form is only 13.8 billion years old, but before that it has existed in some other form. But before the big bang there was no space and no time, because space and time came into existence along with the big bang only. So if the universe was always there even before the big bang, then it was neither in space nor in time, because before the big bang there was no space and no time. Being neither in space nor in time it will thus be spaceless and timeless. It can be shown by simple logic that being spaceless and timeless it will also be changeless, immortal, all-pervading, one, unborn, uncreated, without any beginning, without an end, everlasting, non-composite and immaterial. It will be immaterial because GR has shown that space, time and matter are so interlinked that either all the three of them will be there together, or none of then will be there. But this is the traditional description of God. So are these scientists subscribing to God?
One can see the link here: https://sekharpal.wordpress.com/2015/10/23/who-created-god/
The only way to come out of this mess is to say that if the universe has always existed even before the big bang, then space and time were already there even before the big bang and that the big bang occurred within the pre-existing space-time. The present universe is also expanding within this pre-existing space-time only.