Chasmosaurus belli ROM Royal Tyrrell Museum of Paleontology. Late Cretaceous million years ago. Found at Dinosaur Provincial Park, Alberta, and prepared at the Royal Tyrrell Museum of Paleontology, Drumheller, Alberta. (CC BY SA
Rock Layers: Timeline of Life on EarthEvolution is a complicated subject. While everybody understands that black bears are related to grizzly bears and we can even figure they are related to extinct bears, lots of people wonder how scientists can be so su
Amargasaurus, a Sauropod dinosaur from the early Cretaceous Period (around 130 million years ago). Amargasaurus was small for a Sauropod and featured two rows of spines down its neck and back. Photo taken in Victoria Museum, Melbourne, Australia.
Ankylosaur Pictures: Gastonia//An otherwise unremarkable ankylosaur (armored dinosaur) of North America, Gastonia's claim to fame is that its fossils have been found in the same quarry as the contemporaneous Utahraptor, the largest raptor of all time.
Herrerasaurus was one of the earliest dinosaurs. All known specimens of this carnivore have been discovered in rocks of late Ladinian age (middle Triassic according to the ICS, dated to million years ago) in northwestern Argentina
A reconstruction of an early giant among horned dinosaurs still carries the label Pentaceratops among the fossils in the Sam Noble Museum of Natural History in Norman, Okla., but may deserve to be considered a new species, Titanoceratops.