<p dir="ltr">This manuscript presents the most compact, laboratory-focused exposition of the <b>Mass–Energy Gravity (MEG)</b>framework to date. In MEG every “particle” is a <b>Quantized Energy-Density Gradient (QEDG)</b>—a standing redistribution structure in a continuous energy field. Quantum behaviour arises from one additional, testable postulate:</p><blockquote><p dir="ltr"><b>Collapse occurs only when the external energy-density gradient (EDG) acting on a QEDG exceeds a universal steepness limit U.</b></p></blockquote><p dir="ltr">Using a single Lagrangian we:</p><ol><li><b>Derive</b> the steepness-threshold criterion, the Born-rule probabilities, and the −cosΔθ−cosΔθ Bell-pair correlation without invoking non-local signals or stochastic collapse.</li><li><b>Reproduce</b> key laboratory results—double-slit interference, Afshar’s dark-fringe wires, Wheeler delayed-choice, interaction-free “bomb” tests, loophole-free Bell violations, quantum Zeno/anti-Zeno dynamics, and the real-time reversal of a superconducting-qubit quantum jump.</li><li><b>Predict</b> a measurable pre-collapse warning signal and reversible decoherence when environmental steepness is modulated in time.</li><li><b>Recover</b> physical constants ( h, ℏ, e, c, α ) as ratios of redistribution parameters, and obtain the electron–muon–tau mass spectrum as harmonic resonances of the hydrogen QEDG.</li></ol><p dir="ltr">The paper closes with an <b>Outlook</b> section summarising new nanophotonic and opto-mechanical experiments that could falsify the MEG explanation within existing technology.</p><h3>Significance</h3><ul><li>Eliminates the need for wave-particle duality, intrinsic randomness, and pilot-wave or many-worlds hypotheses.</li><li>Provides a deterministic bridge between quantum optics, superconducting qubits, and forthcoming mesoscopic tests.</li><li>Offers concrete falsifiable predictions rather than metaphysical interpretations.</li></ul><p dir="ltr">For any inquiries contact: chris.sd.mail@gmail.com</p>