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There is no such "substantial" evidence. If there really was scientifically agreed upon "substantial" evidence, then it would be world-shattering news.

• DennisP 4y ago
  Why? It's some weird object that's not a simple rock. Most people don't see that as earth-shattering, just weird. The basic weirdness is this: it didn't move like a rock, and anything normal that outgassed from it would have been visible, but it wasn't. There have been a couple hypotheses for weird things it could have been made of, but those ideas look unlikely for their own reasons. One for example was that it was frozen hydrogen, but that would have evaporated in interstellar space. The earth has not shattered because most people assume there's a reasonable explanation that nobody's figured out yet.