The fossils are 15 million years older than any others belonging to the tyrannosauroid family that have been found in North America.
"You can clearly see the texture of the skin and scales, as well as four-toed claw marks, which are extremely rare," one scientist said.
"Completely unexpected" Triassic creature overthrows many ideas about life on Earth 200 million years ago.
These sharks are now the most popular in the ocean.
How close are we to becoming a T. Rex dinner?
It didn't take long for dinosaurs to take over, according to new research.
It's been 25 years since the release of "Jurassic Park," and our understanding of dinosaurs has evolved considerably. Paleontologists describe new discoveries and technology enabling a better understanding of dinosaurs since "Jurassic Park" came out in 1993.
Some of the textbooks, which are from three Christian publishers, also claim that evolution is untrue.
In 1993, Newsweek examined what looked like a dinosaur phenomenon the likes of which hadn't been seen since the first fossils were discovered: "Jurassic Park" and its sparking of a discussion about cloning.
The asteroid and its after-effects ushered in a great extinction event that wiped out some three quarters of all plant and animal life, including dinosaurs and most birds.
Tiny fish remains were time capsules of climate change.