Part 3 of 4. Cold fusion's most reproducible finding is also its strangest prerequisite: you have to cram deuterium into palladium past a critical loading ratio — roughly 0.85 to 0.90 deuterium atoms per palladium atom — before anything happens at all. We look at what "loading the lattice" really means, why that threshold is so hard to reach and hold, and then at electron screening: the honest, mainstream benchmark for how much a metal's own electrons can shrink the Coulomb barrier, and whether it is anywhere near enough to explain the claims.

This episode was generated by AI from the cited research paper.