137: The Number Physics Still Cannot Explain
Why 137? Physics can measure the fine-structure constant with astonishing precision and explain how it shapes atoms, electromagnetism, and even the energy scale of matter. What it still cannot explain is why nature chose this value at all. From quantum vacuum fluctuations and the anthropic principle to artificial observers and the possibility of a simulated universe, 137 opens a deeper question: are the constants of nature necessary, accidental—or selected by the very existence of observers capable of asking why they are what they are?