Pfft, Angels are intelligent beings, they just exist in a coordinate system the scientists don’t believe exists because they cannot tweak it. They will not take GOD’s word for it, so they will never experience it. The Redeemed however ...
Well, as long as they exist in a different "coordinate system" (a dimension or realm where our physical laws don't apply), our scientists wouldn't "have a problem" with their existence; from our scientists point of view, the question of their existence or non-existence would not be falsifiable (i.e., no conceivable test or experiment could "reveal" them to us).
But as soon as they (the "angels") entered our "realm" or "dimension," then they would be subject to the physical laws of our Universe.
Regards,