The Universe’s Ghostly Hard Drives: Why the Largest Black Holes Are Made of Air

The Universe’s Ghostly Hard Drives: Why the Largest Black Holes Are Made of Air

Imagine an astronaut drifting toward the event horizon of a supermassive black hole. In the calcified view of twentieth-century physics, the crossing is a non-event, a whisper of nothingness before the inevitable crushing at a central singularity. But the modern perspective is far more visceral. As you approach, the vacuum is not empty. It hums with the subcutaneous vibration of fundamental strings. The horizon is not a gateway to a void, but a …