"Finding these tissues in dinosaurs changes the way we think about fossilization, because our theories of how fossils are preserved don't allow for this [soft-tissue preservation],"
But then again, there is alot more faith that Evo's have than Bible Believers.
The skeleton in which the medullary bone was found..."
http://news.nationalgeographic.com/news/2005/03/0324_050324_trexsofttissue_2.html