Prehistoric Life: The Extinct Tyrannosaurus Rex
Dinosaurs: Apex Predators of the Past
The Tyrannosaurus Rex (T. Rex) was a massive theropod dinosaur that roamed the Earth during the Cretaceous period, approximately 68 million years ago. This fearsome predator was one of the largest land animals to have ever existed, reaching lengths of up to 40 feet and weighing an estimated 15 tons.Extinction of the T. Rex
The T. Rex became extinct along with other non-avian dinosaurs at the end of the Cretaceous period, in an event known as the Cretaceous-Paleogene extinction. Scientists believe that this extinction was caused by a combination of factors, including a massive asteroid impact and volcanic eruptions.Nocturnal Behavior
Recent research suggests that the T. Rex may have been nocturnal, or active at night. This theory is based on the discovery of fossilized T. Rex teeth that show signs of wear patterns typically associated with nocturnal predators.Sources:
* Over 1000 Fantastic Animal Facts by Gallagher Belinda (ISBN 9781848105430) * Live Science: T. Rex Was a Nocturnal Predator, New Study Suggests
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