The age of dinosaurs was dominated by colossal giants that roamed the Earth millions of years ago, dwarfing modern animals in their size. These incredible creatures defined prehistoric grandeur, from towering herbivores grazing treetops to massive titanosaurs spanning unimaginable lengths. These are the top twelve biggest dinosaurs to have ever existed.
1. Argentinosaurus
Often regarded as one of the largest dinosaurs, Argentinosaurus lived approximately 90 million years ago during the Late Cretaceous period. Discovered in Argentina, this colossal sauropod could reach lengths of up to 131 feet and weigh around 110 tons. Its fossils, primarily vertebrae and limb bones, indicate it was a massive herbivore that likely browsed on treetops.
2. Patagotitan
Patagotitan, a massive titanosaur, is regarded as one of the largest terrestrial animals ever discovered. Fossils unearthed in Argentina reveal it could reach lengths up to 121 feet in length and weigh an estimated 76 tons. This colossal dinosaur roamed the Earth approximately 100 million years ago during the Late Cretaceous period.
3. Dreadnoughtus
Known for being one of the most complete titanosaurs ever discovered, Dreadnoughtus lived about 77 million years ago in southern Patagonia. This enormous dinosaur was estimated to measure around 85 feet long and weigh about 65 tons. Its name reflects its massive size, suggesting it feared nothing.
4. Bruhathkayosaurus
This giant sauropod, whose name means “huge-bodied lizard,” lived roughly 70 million years ago. Initially misidentified, further analysis classified it as a titanosaurian sauropod. Fossils found in India suggest Bruhathkayosaurus could have been longer than 115 feet and weighed between 120 to 190 tons, making it one of the heaviest dinosaurs known.
5. Supersaurus
Aptly named for its impressive size, the Supersaurus is believed to have stretched between 108 to 118 feet in length. This sauropod lived during the Late Jurassic period, around 150 million years ago, and its fossils have been found in North America. It is estimated to have weighed as much as 44 tons.
6. Sauroposeidon
Known as the “earthquake god lizard,” Sauroposeidon is renowned for its extraordinary size, with an estimated length ranging from 89 to 112 feet. This massive sauropod roamed North America around 110 million years ago, weighing an impressive 44 to 66 tons, making it one of the largest dinosaurs of its time.
7. Maraapunisaurus
While less commonly known, Maraapunisaurus is estimated to have reached lengths of up to 99 feet. Specific details about its weight are not well-documented, but its fossil evidence suggests it was among the largest dinosaurs to have walked the Earth.
8. Ruyangosaurus
Ruyangosaurus, a massive sauropod dinosaur, lived during the Cretaceous period. Its fossils, discovered in the Haoling Formation in China, are limited but include parts of the femur and tibia. Estimates suggest it could reach lengths of up to 115 feet, though more recent studies propose a smaller size of around 81.4 feet. Despite the incomplete fossil evidence, Ruyangosaurus is believed to be one of the largest sauropods to have existed in Cretaceous Asia.
9. Diplodocus
One of the most iconic sauropods, Diplodocus, lived during the Late Jurassic period and could grow between 85 and 98 feet long, with some estimates suggesting it was among the longest dinosaurs. Known for its long neck and whip-like tail, Diplodocus was a herbivore that likely fed on high vegetation.
10. Brachiosaurus
Brachiosaurus is well-known for its long forelimbs and elongated neck, which allowed it to browse treetop foliage. It could grow to 82 feet long and weigh up to 61 tons. Its unique body structure made it one of the tallest dinosaurs, with a small head relative to its massive body.
11. Turiasaurus
This lesser-known dinosaur lived during the early Cretaceous period in what is now known as Spain. Estimates suggest Turiasaurus could reach lengths of up to 98 feet and weigh around 55 tons, making it one of the largest dinosaurs identified in Europe.
12. Austroposeidon
Austroposeidon magnificus, the largest dinosaur discovered in Brazil, was a titanosaur that lived during the Late Cretaceous period. Fossil evidence indicates it measured approximately 82 feet in length, while its weight is unknown. As a herbivore, Austroposeidon would have played a significant role in its ecosystem, consuming vast amounts of vegetation.
Source:
Top 20 Biggest Dinosaurs to Have Ever Existed on Earth
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