Predecessors to dinosaurs missed the race to fill habitats emptied when 9 out of 10 species disappeared during Earth's largest mass extinction 252 million years ago. Or did they?
In a key geological moment about 66 million years ago, an enigmatic something killed off almost all the dinosaurs and some 70 percent of all other species living on Earth.
Scientists say they're homing in on the precise date of both the extinction of the dinosaurs 66 million years ago, and the massive impact that's believed by many to have caused it.
The fossil record can show evidence of sexual selection, say researchers, revealing how members of a species attract a mate.
The Grand Canyon is dramatic enough today - but imagine it with roaming dinosaurs. It now appears that it's been around for 70 million years, a good 65 million longer than believed.
The reason herbivore dinosaurs got so big was their environment, not their diet, researchers say.
Universal Pictures has released a trailer for the 3D release of its classic dinosaur thriller.
Scientists say they've - rather belatedly - identified a completely new type of large, horned dinosaur after re-examining fossils originally collected in 1958.
Cope's Rule - which states that small animals tend to evolve into larger ones - is sometimes true, sometimes not, a new statistical model shows.
The mass extinction that saw the end of the dinosaurs was made worse than it might have been by the structure of the ecosystems of the time.
A US researcher is claiming to have found further evidence that ancient dinosaur proteins - and even DNA - may have been preserved until the present day.
Duck-billed dinosaurs had amazingly complex teeth - much more so than those of cows, horses, and other modern grazers - allowing them to chew tough and abrasive plants with great efficiency.
SPACE has released a trailer for its upcoming dinosaur hunter spin-off.
Terra Nova will never get a second season, thanks a gigantic production budget, but the story can continue on in your imagination, with a little help.
The mass extinction that took out the dinosaurs was already well underway by the time a six-mile asteroid slammed into Mexico's Yucatán Peninsula 65 million years ago, it appears.
Liquid Comics has posted the first chapter of the Dinosaurs vs. Aliens motion comic online.
A new species of feathered dinosaur has been discovered - and it's not closely related to birds, indicating that feathers may have been far more prevalent amongst dinosaurs than previously believed.
A team of Spanish scientists says it's demolished the main evidence that dinosaurs were cold-blooded.
Scientists have developed a new laser technique to measure the weight and size of dinosaurs - and found they were much lighter than previously thought.
The evolution of birds is the result of a drastic change in how dinosaurs developed, Harvard scientists say.