Berkeley, Thursday, April 2, 2020 6:08 PM
Certainly yes, as they are in Berkeley, and everywhere. At some point we might come to realize that the Universe is just not flat, but there is something beyond it. You might want to call it the vertical dimension, if you want to think in physical or in hierarchal terms. Perhaps the latter one is a more appropriate nomenclature.
Further reading, as for doing myself, the following book by Professor Peter Kreeft:
Kreeft, P., 1995. Angels (and Demons): What Do We Really Know about Them?. Ignatius Press.