Alamosaurus
Alamosaurus
 
 
Giraffatitan
Giraffatitan
 
 
Carcharodontosaurus
Carcharodontosaurus
 
 
Giganotosaurus
Giganotosaurus
 
 
Spinosaurus
Spinosaurus
 
*Which Was the Largest Dinosaur?
Topic(s):   Dinosaurs

This is not an easy question. What does biggest mean? Does it mean heaviest? Tallest? Longest? Also, scientists must guess size based on fossil remains. Often, they only have a few bones. They compare the size of those bones to more complete skeletons. Weight is even harder to figure out. It is hard to tell how fat a dinosaur may have gotten.

The sauropods were the biggest dinosaurs. They were huge plant-eaters. The longest complete skeleton is of a Diplodocus. It was 89 feet (27 meters) long. Amphicoelias may have been 196 feet (60 meters) long. But only one of its bones has been found. And it was lost.

Argentinasaurus might be the biggest sauropod known so far. It was probably about 115 feet (35 meters) long. It could have weighed 220,000 pounds (100,000 kilograms). Bruhathkayosaurus might have been even bigger. Only a few bones have been found. One was part of a leg bone. It seems about 30% longer than Argentinasaurusí leg bone. Some people think it is not really a bone, though. They think it is petrified wood.

Giraffatitan may have been the tallest dinosaur. It had a very long neck. It is hard to know how dinosaurs held their necks. If Giraffatitan held its neck up, it was very tall. But it may have held its neck close to the ground.

There were three, huge meat-eaters. Carcharodontosaurus was over 43 feet (13 meters) long and 32,000 pounds (14,500 kilograms). Close behind are Giganotosaurus and Spinosaurus. Tyrannosaurus Rex was only about 39 feet (12 meters) long and 20,000 pounds (9,000 kilograms).

Resource information

United Kingdom Dinosaurs. (October 2001) Earthshakers. Retrieved from http://www.gavinrymill.com/dinosaurs/largest-dinosaur-ever.html

Fact Monster. (2000-2009). Dinosaur Hall of Fame. Retrieved from http://www.factmonster.com/ipka/A0770763.html

Nutt, Amy. (2010). In the Land of Giants - Argentinosaurus, Puertasaurus and Futalognkosaurus. Retrieved from http://ezinearticles.com/?In-the-Land-of-Giants---Argentinosaurus,-Puertasaurus-and-Futalognkosaurus&id=1429740

Owen, James. (April 2006). Meat-Eating Dinosaur Was Bigger Than T. Rex. Retrieved from http://news.nationalgeographic.com/news/2006/04/0417_060417_large_dino.html

Switek, Brian. (January 2009). Battle of the Giant Theropods. Retrieved from http://blogs.smithsonianmag.com/dinosaur/2009/01/28/battle-of-the-giant-theropods/

Citation information

APA Style:† † † † Which Was the Largest Dinosaur?. (2014, March). Retrieved from Facts4Me at http://www.facts4me.com

MLA Style: † † † "Which Was the Largest Dinosaur?." Facts4Me. Mar. 2014. http://www.facts4me.com.

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