The Largest Dinosaur Ever Known to Have Lived Now Complete and On Display in London

100 million years ago giants walked the Earth and among those this one was one of the largest. This is what experts call the Patagotitan mayorum, more commonly called the titanosaur, and for good reason. This absolute gargantuan creature is thought to likely be the biggest to ever walk on land, stretching more than 121 feet from head to tail.