What are some characteristics of dinosaurs? Were archosaurs theropod dinosaurs? What dinosaurs ate plants? What were the predators of Stegosaurus? What was the dominant species on Earth before dinosaurs? What major animal group flourished only after the dinosaurs became extinct? Were Archaeopteryx part...
What is a deonaeosaurid theropod? Was T-Rex the biggest dinosaur? What is the oldest dinosaur fossil? What did dinosaurs look like? What does Tyrannosaurus rex mean? What was the biggest herbivore dinosaur? What are most dinosaur bones permineralized with? Was Tyrannosaurus rex a theropod? Wh...
In 1868, Thomas Henry Huxley described evidence that birds evolved from dinosaurs. This is currently the most widely-held scientific theory about the origin of birds, and it's helped shape today's view of dinosaurs as swift and agile instead of plodding and clumsy. This theropod is part of ...
Dinosaurs are believed to have evolved in the Early Triassic period from carnivorous ornithosuchid ancestor. The oldest known ornithischian isPisanosaurus mertiiand its closely packed teeth suggest that they might have been herbivores. Diet of Theropoda The typical dinosaurian carnivore is a bipedal ...
The fossil record indicates that birds evolved from theropod dinosaurs during the Jurassic period, around 150–200 Ma (million years ago), and the earliest known bird is the Late Jurassic Archaeopteryx, c 150–145 Ma. Most paleontologists regard birds as the only clade of dinosaurs to have ...
There are two answers to this question. In terms of sheer size, the largest brain of all dinosaurs probably belonged to Triceratops, since its head... Learn more about this topic: Paleontologist Overview & Facts from Chapter 5/ Lesson 13 ...
Stegosaurus would have had to defend itself from canivorous theropod dinosaurs such as Allosaurus, and indeed, Allosaurus fossils have been found with skeletal punctures that perfectly match the shape of Stegosaurus tail spikes. Stegosaurids in general went extinct not long after the extinction of ...
Well, all modern birds have wings that are basically enlarged hands, with the middle finger being the longest; the same trait is recorded in all theropod dinosaurs, including Velociraptor and Tyrannosaurus. The feet of birds are also a dead giveaway, especially in the large flightless species ...
Thanks to these discoveries, scientists now believe that the birds that flap around in our backyards directly evolved from small, theropod dinosaurs. They likely acquired bird-like characteristics piece by piece, shrinking, losin...
Contemporary researchers classify Archaeopteryx as a theropod dinosaur. Theropods are a group of bipedal, carnivorous dinosaurs that gave rise to modern bird species. Like modern birds, Archaeopteryx also possessed pennaceous feathers that are branched when viewed under a microscope. This branching increas...