The meat-eating dinosaurs known as theropods that roamed the ancient Earth ranged in size from the bus-sized T. rex to the smaller, dog-sized Velociraptor. Scientists puzzling over how such wildly ...

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 ...

For more than a century, the largest dinosaurs have seemed like a closed club dominated by a few famous sauropods with necks as long as city buses. Now a neglected set of bones is forcing ...

The monstrous creature would have grown to 88 feet (27 metres) in length and weighed 27 tonnes – as much as nine adult Asian Elephants. That makes this dinosaur, dubbed Nagatitan chaiyaphumensis, the ...