Fossils are found in a variety of rock formations dating to the latest Campanian - Maastrichtian ages of the late Cretaceous period, 72.7 to 66 million years ago, with isolated specimens possibly indicating an earlier origin in the middle Campanian.

Tyrannosaurus is one of the most iconic dinosaurs and is known from numerous specimens, some of which have individually acquired notability due to their scientific significance and media coverage. The base skeleton that was used as the iconic symbol for the famous logo of the Jurassic Park film series.

2024年12月12日 · Tyrannosaurus rex, (Tyrannosaurus rex), species of predatory dinosaurs that lived during the end of the Cretaceous Period (about 66 million years ago) known from fossils found in the United States and Canada dating to between …

The free-standing T. rex mount in the Hall of Saurischian Dinosaurs is about 45 percent real fossils, all of them—including the vertebrae, hips, and ribs—from a specimen found by Museum fossil hunter Barnum Brown at Big Dry Creek, Montana, in 1908.

2024年12月11日 · tyrannosaur, any of a group of predatory dinosaurs that lived from the late Jurassic Period (about 150 million years ago) to the end of the Cretaceous Period (about 65 million years ago), at which time they reached their greatest dominance.

2014年4月1日 · Based on growth rings in fossil bones, scientists know that the longest-lived T. rex specimen was 28 when it died and suffered many injuries over its lifetime. How closely is T. rex related to birds?

2024年12月11日 · Found in the same deposits as T. rex are fossils of the ceratopsians (giant horned dinosaurs) on which they likely preyed. There is some question about whether tyrannosaurs killed their food or simply scavenged it.

Learn about the Wankel Tyrannosaurus rex skeleton, T. rex fossils, and current research into how T. rex stood and walked.

Some tyrannosaur fossils show evidence of bite marks from other tyrannosaurids, suggesting that there might have been fierce fighting between tyrannosaurs, or even cannibalism. Photo by Dave Smith, © 2003 UCMP. T. rex was one of the largest terrestrial carnivores of all time.

Based on fossil specimens, scientists have determined that a Tyrannosaurus rex could be up to 40 feet long and 12 feet high. T. rex is estimated to have weighed between 11,000 and 15,500 pounds (5,000 and 7,000 kilograms) with skin and flesh on its huge bones.