Was the concept of a White Hole ever intended to as a POSSIBLE explanation for the Big Bang, inflation and dark energy expansion of the Universe? Or is it considered crack pottery by the cosmology community? I presume the observable Universe would need to be as small as say a single atom in comparison to perhaps the size of a spinning Catherine Wheel firework to explain flatness and homogeneity of the observable Universe in every direction. Presumably white holes would last almost forever like black holes, so many, many observable universes away from here, new parts of the Universe might be continually being created? According to the last paragraph on this wiki page the above appears to have been proposed. Does the Cosmology community accept it as a possible description for the creation and perhaps also ongoing creation of our Universe, or just crack pottery? https://en.wikipedia.org/wiki/White_hole And please don't chew me up for asking this question, as too often happens here. I despise that attitude. I also listed it as a high school question to try to avoid that pitfall. In my opinion we should encourage questions at least that's what they taught me when I went to school.