~101 million years ago (Cretaceous)Reputable sourceWell documented
Patagotitan and the Largest Dinosaurs
On the timeline · around ~101 million years ago (Cretaceous) · The Cretaceous
What happened
Titanosaurs — the last and largest of the sauropods — reached staggering sizes in the Cretaceous. Patagotitan, from ~101-million-year-old rocks of Argentina, measured about 37.5 metres long and weighed an estimated 57 tonnes.
Why it matters
These giants were among the largest land animals ever to exist — longer than a blue whale and as heavy as around ten elephants — testing the physical limits of life on land.
Sources
- Natural History Museum. What was the biggest dinosaur? · Reputable source