We know dinosaurs were big, but how big were they? And how do we even know? Luckily, paleontologists and other scientists know how to find the answers. By measuring fossils, comparing them to the bones of living animal species and doing a whole lot of math ...

By Will Dunham May 14 (Reuters) - Along a meandering river in a warm and arid region that is now Thailand roughly 113 million years ago, a plant-eating behemoth almost 90 feet (27 meters) long browsed on the treetops without much fear of predators due to its sheer size.

A massive new dinosaur has been discovered in Thailand, and it’s now the largest ever found in Southeast Asia. Named Nagatitan chaiyaphumensis, the sauropod reached around 90 feet in length and weighed about 30 tons,

Zavier (14) of Tauranga in New Zealand asks: What was the biggest dinosaur? Great question, Zavier, and one that palaeontologists (scientists who study fossil animals and plants) are interested in all around the world. And let’s face it, kids – and ...

When you think of the largest carnivorous dinosaurs, you might picture a massive predator biting through bone in one devastating snap. That image fits Tyrannosaurus rex, but new research shows it doesn’t hold true for all of its giant, two-legged rivals.