Lex Fridman · The worst prediction in physics | Don Lincoln and Lex Fridman

1. 1. Don Lincoln describes the "worst prediction in physics" as the vast disagreement between quantum field theory and observed dark energy.
2. 2. Quantum field theory's calculation for vacuum energy is an astonishing 10^120 times greater than the measured dark energy.
3. 3. Even if new physics is discovered at energies measurable by current accelerators, the vacuum energy prediction would still be off by 10^60.
4. 4. A potential theoretical solution involves an additional field that almost perfectly cancels out the predicted vacuum energy, leaving a small residual.
5. 5. Lex Fridman highlights that perfect cancellation to zero is easier for theorists than explaining the specific, small residual of dark energy.
6. 6. Theorists approach solving this problem by adding elements to existing equations that minimally alter measured realms but fix the core dark energy issue.
7. 7. Finding a solution is a multi-step process, prioritizing candidate theories that address the problem without introducing already-ruled-out predictions.