More than 66 million years ago, a “tyrant lizard king” ruled western North America: the fearsome predatory dinosaur Tyrannosaurus rex. But how large was this monarch’s royal family?

Cassius explains that the T. rex precursors - tyrannosaurids - likely crossed a land bridge across the Bering Strait between modern-day Siberia and Alaska. Due to how few tyrannosaurids there were ...

The end Cretaceous Northern Hemisphere fauna was dominated by Tyrannosaurids (such as Tyrannosaurus rex), hadrosaurs and ceratopsian ornithischian dinosaurs. (Image Credit: Pedro Salas and Sergey ...

The ‘king’ of the dinosaurs might not be the all-American predator it appears to be. While fossils of Tyrannosaurus rex are exclusively found in the USA and Canada, new research suggests its ancestors ...

An illustration of dinosaurs during the late Cretaceous, including T. rex, who is now thought to have evolved in North America and not Asia. (Image credit: ROGER HARRIS/SPL/Getty Images) The ...

Across the region, buildings, neighborhoods, and landmarks will shine blue in solidarity with law enforcement. Among those being remembered this year is Deputy Rex A. Emrick of the Pickaway County ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The direct ancestor ...

Tyrannosaurus rex evolved in North America, but its direct ancestor came from Asia, crossing a land bridge connecting the continents more than 70 million years ago, according to a new study.

Tyrannosaurus rex evolved in North America, but its direct ancestor came from Asia, crossing a land bridge connecting the continents more than 70 million years ago, according to a new study led by UCL ...

Long before they became T. Rex, the group called Tyrannosaurus Rex would understandably have thought they’d cracked it when their first album, the expansively-titled My People Were Fair and Had ...

Their goal: to create a cruelty-free, environmentally friendly, high-quality alternative to traditional leather, purportedly using Tyrannosaurus rex DNA. According to a company statement ...