Tyrannosaurus Rex
Allosaurus
Ecosystem
Forested plains, floodplains
Plains, forests
Diet
Carnivore
Carnivore
Time Period
Late Cretaceous
Late Jurassic
Continent
North America
North America, Europe
Timeline of Discovery
1902: Tyrannosaurus Rex
Discovered by: Barnum Brown
Location: Hell Creek Formation, Montana, USA
Key Fact: The first T. Rex fossil was a partial skeleton, including the skull and vertebrae. It was named by Henry Fairfield Osborn in 1905.
1877: Allosaurus
Discovered by: Othniel Charles Marsh
Location: Morrison Formation, USA
Key Fact: Allosaurus was one of the first large theropods discovered and is one of the best-studied dinosaurs, with numerous fossils found.
1990: T. Rex "Sue"
Discovered by: Sue Hendrickson
Location: South Dakota, USA
Key Fact: "Sue" is the most complete and well-preserved T. Rex skeleton ever found, with over 90% of its bones recovered.
Fun Facts
T. Rex Had Feathers
Young T. Rex dinosaurs were covered in feathers, which they lost as they grew older.
Allosaurus Hunted in Packs
Some scientists believe Allosaurus may have hunted in packs to take down large prey like sauropods.
More Details
The Tyrannosaurus Rex and Allosaurus were two of the most iconic predators of the Mesozoic Era, but they lived in different time periods and had distinct adaptations. T. Rex, the "king of the dinosaurs," was a Late Cretaceous predator known for its immense size, powerful bite force, and robust build. Allosaurus, on the other hand, was a Late Jurassic predator that relied on speed, agility, and sharp teeth to take down prey. T. Rex was a heavyweight champion, weighing up to 9 tons and standing 12-15 feet tall. Its bite force of ~12,800 psi was unmatched, allowing it to crush bones with ease. Despite its size, T. Rex could reach speeds of 12-20 mph, making it a formidable hunter. Allosaurus, while smaller at ~2.5 tons and 16 feet tall, was faster and more agile. Its bite force of ~3,500 psi was weaker than T. Rex's, but its speed (21-34 mph) and serrated teeth made it a deadly predator. Allosaurus likely hunted in packs, taking down large sauropods by targeting weak points. In a hypothetical battle, T. Rex's size and bite force would give it the upper hand in a direct confrontation. However, Allosaurus's speed and pack-hunting behavior could make it a dangerous opponent in certain scenarios. Final Verdict: T. Rex Wins 8/10 Times!
