Eh - I am still skeptical on this whole “soft tissue” hubajoo. I have a friend who has done research into it and he believes the “soft tissue” is bacterial bio film. The iron nanoparticles the article refers to are called frambroids and are found else where where there is no blood, such as an ammonite shell. They are found in other places beside fossils and aren’t necessarily caused by blood in anyway.
Biofilm isn’t as romantic as dino tissue, but I think it’s a more likely origin.
He had a really good poster outlining his findings, but I can’t seem to find it, but here is a copy of a published paper.
