The Tyrannosaurus rex, simply referred to as the T. rex, is an extinct and well-known dinosaur species that lived during the Cretaceous period.



In what would eventually become known as South Dakota, 69,997,983 BC (during the Cretaceous period), the time-stranded Ray Palmer was forced to survive in the world dominated by dinosaurs, encountering at least one female T. rex (which he nicknamed Gertrude) and possibly a male as well. Ray was confronted by Gertrude before he was rescued by Nate Heywood and Mick Rory.[1]

When the Waverider crash-landed back in the same geological time period, Ray led Nate and Amaya Jiwe to retrieve a component of the ship, which had ironically ended up in Gertrude's nest. When Gertrude came across them later, Amaya used the Anansi Totem to use the spirit of a T. rex to communicate with the female, resulting in Gertrude leaving them in peace. [2]

A terror of T. rex appeared en masse in 2017's Los Angeles after the actions of the Legends created a time storm and "broke time", however they were relatively quickly captured by Rip Hunter's Time Bureau and sent back to their time.[3][4]


It was implied by a museum tour guide that the T. rex species was wiped out by an asteroid.

A small T. rex sculpture is displayed at a museum in National City. Malefic J'onzz attacked the museum by transforming into the prehistoric reptile and escaped with Kal-El's pod.[5]

Known Tyrannosaurus rex




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  • In the real world, the species Tyrannosaurus rex (rex meaning "king" in Latin), often called T. rex or colloquially T-Rex, is one of the most well-represented of the large theropods. Fossils are found in a variety of rock formations dating to the Maastrichtian age of the upper Cretaceous Period, 68 to 66 million years ago.


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