You have to know that is just plain retarded.
http://www.pbs.org/wgbh/nova/nature/t-rex-blood.html
https://www.livescience.com/41537-t-rex-soft-tissue.html
https://www.smithsonianmag.com/science-nature/dinosaur-shocker-115306469/
Retarded is making that comment and not looking up the articles yourself.