Here's why there aren't more medium-size carnivorous dinosaurs.
Dinosaurs types are many and varied, from small bird-like creatures to the largest animals ever to walk on Earth. The subject of blockbuster films, history museum exhibits and much more, dinosaurs continue to interest people today after first appearing approximately 230 million years ago. These vertebrate animals dominated the land for more than 160 million years before experiencing a catastrophic extinction at the end of the Cretaceous period 65 million years ago.The first dinosaur was recognized in the 19th century and ever since, dinosaurs have been the source of many questions.What contributed to the rapid extinction of the dinosaur? What do the latest fossil findings reveal about the dinosaur and its way of life? How is the modern bird connected to these prehistoric creatures? Could dinosaurs like Tyrannosaurus Rex and Brontosaurus really be brought back to life with mosquito DNA?Inside you'll find dinosaur news & features, along with plenty of pictures.
The chunk of space rock that killed the nonavian dinosaurs may have been a piece of a comet that Jupiter's gravity kicked onto a collision course with Earth.
Paleontologists in Argentina have partially uncovered the remains of what is believed to be the largest animal to ever walk the Earth.
Two dinosaurs that died in China during the Cretaceous were fossilized in 3D — but it probably wasn't a volcanic eruption that killed and preserved them.
The T. rex and Triceratops were discovered in 2006, but this sale marks the first time scientists will be able to study them in detail.
The Carnian Pluvial Event (CPE) ushered in 1 million years of rain and killed as many as 33% of all marine life, a new study suggests.
The final chapter of dinosaur history is a tale stretching across two very different worlds, each a vast supercontinent dominated by its own unique mix of predators and herbivores.
A Tyrannosaurus rex called Stan ended up on the auction block because of a lawsuit. Here's how it happened.
The asteroid that sealed the dinosaurs' fate at the end of the Cretaceous struck at an angle that was the worst-case scenario for life on Earth.
Researchers studied bite marks on more than 2,000 dinosaur bones and found that some of them were cannibalized.