How Come We’ve Never Observed a Black Hole Decaying?
All throughout the Universe, ranging from just a few times our Sun’s mass all the way up to supermassive scales, black holes are found almost everywhere.
According to Stephen Hawking and the concept of Hawking radiation, black holes cannot remain stable forever, but must inevitably decay.
And yet, across the entire Universe for all the time we’ve been observing it, we’ve never once seen a black hole actually decay.