No. There has been only one study that I am aware of.<quoted text>
Do you have an opposing position? I would love to hear it?
I would not bet that the whole genome deteriorates at the same rate from one study only. There is a reason that scientists repeat experiments and add variables to the original experiment. From the one experiment done they have a half life of 521 years which means there would be no DNA in a 65 million year old fossil. Now they have not found actual DNA in the fossil. What they have found is that chemicals that react with DNA in a specific fashion will react with the material from the T-Rex fossil. This is strongly indicative of DNA, but it is not finding actual DNA. Going back to the experiment they are from samples up to several thousand years old. I just looked it up again, I have read it before, anyway they had bones up to 7,000 years old. That means that in the oldest bones only 1/8000 of the original DNA was there. In a dinosaur fossil we should have none.
This is a bit out of my specialty too, but I do not see those who are experts in this science going "woe is me, we are undone" so I am not too worried.