Now that was a huge brainstorm, billions of thoughts at once! Because this is so complex, catch whatever comes into mind and write it down! Luckily I found good info here, there was some matter on this subject regarding parasites/solvents/metals, mostly Hulda stuff though..
When days pass, and I read I realize that the complexity grows and grows, am afraid this will evolve to some sort of riddle if to many questions will arise and too many variables will be taken into consideration. I also wish there was more support behind these theories.