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"We have NO preserved tyrannosaurid DNA (indeed, not Mesozoic dinosaur DNA sequences), so there are no T-Rex genes,” Thomas Holtz, Jr., a vertebrate palaeontologist at the University of Maryland ...

“I doubt that our knowledge of dinosaur evolution is good enough to be able to design a collagen gene specifically from T. rex." But researchers have found collagen in an 80-million-year-old ...