I will not deny the meteor impact theory. It is quite plausible.
I had to write the interstellar electromagnetic discharge down because it appears scientifically possible, and I would like to have scientists look at it. They, too, may dismiss it out of hand, but the good ones will bring scientific reasoning. I am looking for a professional response.
When I asked scientists how Iridium is produced, I bumped into their understanding the larger setting (variety of options), but their not having a good understanding how iridium is produced specifically.
Thank you for your response.