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Tyrannosaurus rex
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Tyrannosaurus rex was a large
Theropod dinosaur. The animal was a
carnivore (meat-eater), and lived in North America and Asia
during late Cretaceous period,
about 67 to 65 million years ago.
It was one of the last dinosaurs, and probably went
extinct
during the the
Cretaceous-Tertiary mass
extinction.
An average Tyrannosaurus was about about 39 feet (11.9 meters) long, up to
20 feet (6.1 meters) tall, and weighed around 7 tons.
Until the mid-1990s, it was generally thought that Tyrannosaurus was the largest
land predator ever. Then, scientists discovered
Giganotosaurus which
lived was a 45 feet (13.8 meter) long carnivore that lived in Argentina about 100
million years ago. New research, first published in
2006, now suggests
that
Spinosaurus may have been even
larger still: upto 51 feet (17 meters) long.
Since the 1960s, some scientists have argued that Tyrannosaurus was not
a fearsome predator, but a slow-moving scavenger, that fed on carcasses
killed by other carnivores.
However, other scientists
argue that the possibility of binocular vision (Tyrannosaurus rex has
two forward facing eyes), and the relatively large areas of the
brain associated with sight and smell, suggest it must have been an active predator.
Tyrannosaurus rex arm bones:
The name Tyrannosaurus rex
was chosen by
Henry Fairfield Osborn
in
1905,
and like most scientific names of animals is derived from Ancient Greek.
"Tyrannosaurus" means "tyrant lizard",
"rex" means "king", and hence in combination
"Tyrannosaurus rex" means
"tyrant king lizard".
Tyrannosaurus rex skull:
Tyrannosaurus rex Timeline:
Tyrannosaurus rex was a carnivore (meat-eater) that lived from 67 to 65 million years ago
Related Information & Resources
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Tyrannosaurus rex Facts
Here is a summary of some of the key facts about Tyrannosaurus rex:
- Tyrannosaurus rex was a species of dinosaur.
- "Tyrannosaurus rex" means "tyrant lizard king". This name was chosen by Henry Fairfield Osborn in 1905.
- Tyrannosaurus rex was a member of the Saurischia ("lizard-hipped") order of dinosaurs. What this means, is that although Tyrannosaurus rex was not closely related to lizards, it did have similarly shaped pelvic bones.
- Tyrannosaurus rex was a Theropod - a member of a group of related bipedal dinosaurs that included the ancestors of birds (although Tyrannosaurus rex was not itself an ancestor of birds).
- Tyrannosaurus rex lived between about 67 million years ago and 65 million years ago, during the late Cretaceous period.
- Tyrannosaurus rex was one of the dinosaurs which died out during the Cretaceous-Tertiary mass extinction at the end of the Mesozoic Era.
- Tyrannosaurus rex lived in North America and Asia.
- Tyrannosaurus rex was a carnivore (meat-eater).
- Some scientists think that Tyrannosaurus rex was probably a scavenger, but others think it was an active predator.
- Tyrannosaurus rex was about 39 feet (11.9 meters) long, and about 20 feet (6.1 meters) tall.
- Tyrannosaurus rex weighed about 7 tons.
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Tyrannosaurus rex Books
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By Storybots
Penguin
Released: September 5th, 2017
Multicolor Paperback (32 pages)
 | List Price: $4.99*
Lowest New Price: $3.28*
In Stock*
*(As of 15:03 Pacific 15 Jan 2025 More Info)
Click Here | Description:
Tyrannosaurus Rex (StoryBots) (Step into Reading)- Manufacturer: Random House Books for Young Readers
- Brand: Penguin
- ISBN: 1524718661
- EAN: 9781524718664
- PartNumber: 9781524718664
Details:- Paperback
- Format: Illustrated
- Edition: Illustrated
- Number of Pages: 32
- Author: Storybots
- Publication Date: September 5th, 2017
- Release Date: September 5th, 2017
Physical Description:- Size: 9.0 Inches by 6.0 inches by 0.12 Inches
- Weight: 2.314853751 Pounds
- Color: Multicolor
Click here for more information |
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By Mark P. Witton
Princeton University Press
Released: May 13th, 2025
Hardcover (320 pages)
 | Lowest New Price: $39.95*
This title will be released on May 13, 2025. Pre-order now.*
*(As of 15:03 Pacific 15 Jan 2025 More Info)
Click Here | Description:
King Tyrant: A Natural History of Tyrannosaurus rex- Manufacturer: Princeton University Press
- ISBN: 0691245584
- EAN: 9780691245584
Details:- Hardcover
- Number of Pages: 320
- Author: Mark P. Witton
- Publication Date: May 13th, 2025
- Release Date: May 13th, 2025
Click here for more information |
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Indiana University Press
Released: July 17th, 2008
Hardcover (456 pages)
 | List Price: $49.95*
Lowest New Price: $41.50*
In Stock*
*(As of 15:03 Pacific 15 Jan 2025 More Info)
Click Here | Description:
Tyrannosaurus rex, the Tyrant King (Life of the Past)- Manufacturer: Indiana University Press
- Brand: Indiana University Press
- ISBN: 0253350875
- EAN: 9780253350879
- PartNumber: 215 b&w photos
Details:- Hardcover
- Format: Download: Adobe Reader
- Edition: HAR/CDR
- Number of Pages: 456
- Publication Date: July 17th, 2008
- Release Date: July 17th, 2008
Physical Description:- Size: 10.3 inches by 7.32 inches by 1.28 inches
- Weight: 2.4802004475 Pounds
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By Jerry Pallotta
Scholastic
Released: December 29th, 2015
Paperback (32 pages)
 | Lowest New Price: $3.99*
In Stock*
*(As of 15:03 Pacific 15 Jan 2025 More Info)
Click Here | Description:
Who Would Win? Tyrannosaurus Rex vs. Velociraptor- Manufacturer: Scholastic Inc.
- Brand: Scholastic
- ISBN: 0545175739
- EAN: 9780545175739
- PartNumber: illustrations
Details:- Paperback
- Edition: Reprint
- Number of Pages: 32
- Author: Jerry Pallotta
- Publication Date: December 29th, 2015
- Release Date: December 29th, 2015
Physical Description:- Size: 9.25 inches by 6.0 inches by 0.25 inches
- Weight: 2.314853751 pounds
Features:- Item #:NTS517573
- ISBN13:9780545175739
- Format:Paperback Book
- Pages:32
- Publisher:Scholastic Inc.
- Genre:Informational Text
- Grades:2 - 4
- Lexile Measure:660L
- Reading Level:O
- DRA Level:34 - 38
- ACR Level:4.3
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By Campbell Books
Campbell Books
Released: August 1st, 2023
Board book (10 pages)
 | List Price: $8.99*
Lowest New Price: $6.99*
In Stock*
*(As of 15:03 Pacific 15 Jan 2025 More Info)
Click Here | Description:
Tyrannosaurus rex (Hello Dinosaur)- Manufacturer: Campbell Books
- ISBN: 1035016214
- EAN: 9781035016211
- PartNumber: 9781035016211
Details:- Product Category: Board book
- Number of Pages: 10
- Author: Campbell Books
- Publication Date: August 1st, 2023
- Release Date: August 1st, 2023
Physical Description:- Size: 7.1 Inches by 7.15 Inches by 0.5999988 Inches
- Weight: 0.70106999316 Pounds
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By Dougal Dixon
Templar Publishing
Released: November 14th, 2019
Hardcover (16 pages)
 | Lowest New Price: $31.22*
In Stock*
*(As of 15:03 Pacific 15 Jan 2025 More Info)
Click Here | Description:
Tyrannosaurus rex: A Pop-Up Guide to Anatomy (Pop Up Book)- Manufacturer: Templar Publishing
- Brand: Templar Publishing
- ISBN: 1787413349
- EAN: 9781787413344
- PartNumber: 9781787413344
Details:- Hardcover
- Number of Pages: 16
- Author: Dougal Dixon
- Publication Date: November 14th, 2019
- Release Date: November 14th, 2019
Physical Description:- Size: 12.79525 Inches by 9.64565 Inches by 0.98425 Inches
- Weight: 2.314853751 Pounds
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