Dinosaur soft tissue discovered
Wow! Apparently, some soft tissue (as in blood vessels and possibly cells) of a T. rex was recently found. Scientists are talking about extracting DNA from it and about how the blood vessels look a lot like those of an ostrich.
T. rex soft tissues recovered in Montana / Nonfossil rarity has scientists talking about DNA studies
Check out the original source articles in Science (25 March 2005, Volume 307, Number 5717). Access to Science online requires a subscription, but any good library should have a copy of the journal.