Board Thread:False Info and Speculative Discussion/@comment-78.0.215.197-20150202084809/@comment-11533671-20150203070728

Actually, the fact that lightning irl is proven to be able to fuse metals back together by raising the temperature of the metal to a fusion point is shown in instances where liquid drops of metal hit by lightning have burned holes in wood and through a ships decking.

Since lightning can generate air temps inside of it at @ 50,000 °F it can turn any metal liquid. Molten metal liquid produces electricity and magnetism when moved (i.e. Earth's core) much like an electric generator. The magnetism could pick up the metal pieces.

Basic science for ya! So while it could have been magical...science can also explain the katana being made whole again.