Dreadnoughtus Facts
| Diet | Herbivore |
| Height | 6m |
| Length | 26m |
| Weight | 49 tonnes |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Sauropod |
| Location | Argentina |

| Diet | Herbivore |
| Height | 6m |
| Length | 26m |
| Weight | 49 tonnes |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Sauropod |
| Location | Argentina |
Dreadnoughtus was one of the largest sauropod dinosaurs ever discovered, living around 83.6 million years ago during the Late Cretaceous period in what is now Argentina. This colossal herbivore measured an extraordinary 26 metres in length and weighed up to 49 tonnes, making it one of the most massive land animals that ever existed. Despite its enormous size, the fossils show that the specimen found was not even fully grown, suggesting adult Dreadnoughtus could have been even larger.
Like other sauropods, Dreadnoughtus had the classic long-necked body plan with four pillar-like legs, a massive body, and a long tail. Its neck alone would have stretched over 11 metres, allowing it to reach vegetation high in the treetops that other dinosaurs couldn't access. The creature's backbone was supported by enormous ribs and a complex system of air-filled bones that helped reduce its weight whilst maintaining strength.
As a plant-eater, Dreadnoughtus would have spent most of its time feeding, requiring hundreds of kilograms of vegetation daily to fuel its massive body. It likely used its long neck like a giant crane, sweeping back and forth to strip leaves and branches from conifers and ferns. The dinosaur's teeth were small and peg-like, designed for stripping rather than chewing, so it probably swallowed stones to help grind food in its stomach.
What makes Dreadnoughtus particularly important to palaeontologists is the completeness of its remains. Unlike many giant sauropods known only from fragmentary fossils, Dreadnoughtus is represented by about 45% of its skeleton, giving scientists unprecedented insight into the anatomy and lifestyle of these prehistoric giants.
Dreadnoughtus was distinguished by its colossal size, with an exceptionally long neck stretching over 11 metres and a massive, barrel-shaped body supported by four enormous pillar-like legs. Its backbone featured complex air-filled bones and robust neural spines that supported its tremendous weight.
Dreadnoughtus likely lived in herds and spent most of its time feeding, using its enormously long neck to reach high vegetation that other dinosaurs couldn't access. Due to its massive size, adults would have had few predators and likely moved slowly and deliberately across the landscape.
Dreadnoughtus has appeared in several documentaries about giant dinosaurs and is featured in various dinosaur-themed educational programmes, though it's less common in mainstream films due to its relatively recent discovery.
| Phylum | Chordata |
| Class | Saurischia |
| Genus | Dreadnoughtus |
Dreadnoughtus was first described by Kenneth Lacovara in 2014. The original fossils were discovered at Cerro Fortaleza Formation, Santa Cruz Province, Argentina.