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T. rex went extinct 66 million years ago, so there's no hope of ever recovering its DNA. What the team will actually refer to as a blueprint for this lab-grown leather is fossilized T. rex ...

"Dozens of T. rex fossils have been unearthed in North America but our findings indicate that the fossils of T. rex's direct ancestor ... They used mathematical models drawing on fossils ...

"Dozens of T. rex fossils have been unearthed in North America but our findings indicate that the fossils of T. rex's direct ancestor ... They used mathematical models drawing on fossils ...