Most people assume that the North AmericanTyrannosaurus rex—at 40 feet from head to tail and seven to nine tons—was the biggest carnivorous dinosaur that ever lived.T. rex, however, was equaled or outclassed by not one but two dinosaurs: the South AmericanGiganotosaurus, which weighed abou...
Therapods are two-legged dinosaurs that include familiar predators likeVelociraptorsand T. Rex, which quite likely had some kind of feathers. While many feathered dinosaurswere small, some, likeYutyrannus, were big:The 30-foot...
Feathers don't fossilize well, but some remarkable fossils, especially those from Liaoning province in China that were buried in the aftermath of a volcanic eruption, have preserved feathers. Here are a few examples: Zhenyuanlong suni, Yutyrannus huali and Jianianhualong tengi. It's unclear why...
2. Latenivenatrix How could you not like a Dino with a name like that 1. Dakotaraptor I've only just really started getting into this Dino, but I love it already. It was like a slightly smaller, more agile and faster version of Utahraptor. Plus it lived alongside T Rex and Tricerato...
analogues, we hypothesize (although currently untestable) that (1) many bony ornamented theropods lived in open habitats and (2) the socio- sexual system that rewarded bony ornaments and an open living habit were likely dual drivers of the mass increases in theropod dinosaurs included in our ...
large and three-fingered arm that does not resemble the withered two-fingered forearm ofT. rexand close relatives. With its gaudy midline skull crest, huge external naris and proportionally long arms,Yutyrannus(and probablySinotyrannus) resemble overgrown versions ofGuanlong, not proto-tyrannosaurids....