An enormous species of dinosaur, which weighed more than a Boeing 737, has been discovered by scientists who claim the beast was so large it would have "feared nothing".
Named Dreadnoughtus schrani, after the fortified dreadnought battleships of the early 20th century, the herbivore would have done little other than eat in order to support its vast frame.
Measurements of its fossilised bones suggest that the creature measured 85ft in length and weighed about 65 tonnes - equal to more than seven Tyrannosaurus Rex, four diplodocus or a dozen African elephants.
The remains unearthed in Argentina represent by far the most complete skeleton ever recovered of a supermassive herbivore from a group known as titanosaurs.
Although partial skeletons of potentially larger cousins have previously been found, the find makes Dreadnoughtus the largest land animal recorded.
"It is by far the best example we have of any of the most giant creatures to ever walk the planet," said Dr Kenneth Lacorvara of Drexel University in Philadelphia said.