Dinosaurs
The Biggest Dinosaurs Ever, Explained: Sauropods, Size, and Science
The largest animals to have ever walked on land were not the predators — they were the plant-eaters. Patagotitan mayorum, a titanosaur from Argentina, weighed an estimated 57–70 tonnes and stretched roughly 37 meters from snout to tail. Getting to that scale required solutions to engineering problems that no other land animal has ever faced or solved.