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Dinosaur : any of a group (Dinosauria) of extinct often very large chiefly terrestrial carnivorous or herbivorous reptiles of the Mesozoic era — Webster
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Dinosaurare a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago, although the exact origin and timing of the evolution of dinosaurs is the subject of active research. They became the dominant terrestrial vertebrates after the Triassic–Jurassic extinction event 201 million years ago; their dominance continued through the Jurassic and Cretaceous periods. Reverse genetic engineering and the fossil record both demonstrate that birds are modern feathered dinosaurs, having evolved from earlier theropods during the late Jurassic Period. As such, birds were the only dinosaur lineage to survive the Cretaceous–Paleogene extinction event 66 million years ago. Dinosaurs can therefore be divided into avian dinosaurs, or birds; and non-avian dinosaurs, which are all dinosaurs other than birds. — Wikipedia
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Dinosaurs News -- ScienceDaily All about dinosaurs. Read about dinosaur discoveries including gigantic meat-eating dinosaurs, earliest dinosaurs and more. Dinosaur pictures and articles.
- Tiny cat-sized stegosaur leaves its markon April 16, 2021 at 4:01 pm
A single footprint left by a cat-sized dinosaur around 100 million years ago has been discovered in China by an international team of palaeontologists.
- How many T. rexes were there? Billionson April 15, 2021 at 6:26 pm
With fossils few and far between, paleontologists have shied away from estimating the size of extinct populations. But scientists decided to try, focusing on the North American predator T. rex. Using data from the latest fossil analyses, they concluded that some 20,000 adults likely roamed the continent at any one time, from Mexico to Canada. The species survived for perhaps 2.5 million years, which means that about 2.5 billion lived and died overall.
- How the Chicxulub impactor gave rise to modern...on April 2, 2021 at 1:59 pm
The asteroid that took out the dinosaurs left the planet in darkness. What did rainforests in South America look like before the impact, and how did they change as a result?
- The 'one who causes fear' - new meat-eating...on March 31, 2021 at 1:09 am
Superbly preserved braincase of this new species is an important find - it suggests there was a greater diversity and abundance of abelisaurids late in dinosaurs' era than previously thought.
- How life on land recovered after 'The Great Dying'on March 17, 2021 at 1:46 am
A new study shows in detail how life recovered from 'The Great Dying' in comparison to two smaller extinction events. The international study team showed for the first time that this mass extinction was harsher than other events due to a major collapse in diversity. Ultimately, characterizing communities -- especially those that recovered successfully -- provides valuable insights into how modern species might fare as humans push the planet to the brink.
Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.
- 'Godzilla' shark discovered in New Mexico gets...on April 16, 2021 at 9:09 pm
The 300-million-year-old shark's teeth were the first sign that it might be a distinct species.
- International paleontology team discovers tiny...on April 16, 2021 at 2:53 pm
A single footprint left by a cat-sized dinosaur around 100 million years ago has been discovered in China by an international team of paleontologists.
- Examining the impact of Earth's most devastating...on April 16, 2021 at 12:50 pm
Dr. Luis Buatois (Ph.D.), a faculty member in the Department of Geological Sciences in USask's College of Arts and Science, is the lead author on a new paper published in the journal Terra Nova. The article, titled "Impact of Permian mass extinctions on continental invertebrate infauna," was co-authored with five researchers from universities in Madrid and Salamanca, Spain.
- How many T. rexes were there? Billions.on April 15, 2021 at 6:00 pm
How many Tyrannosaurus rexes roamed North America during the Cretaceous period?
- Short duration of the Yixian Formation and...on April 14, 2021 at 4:15 pm
The Early Cretaceous Jehol Biota, renowned for its exceptionally well preserved volcanic-influenced ecosystem, was buried in lacustrine and occasionally fluvial sediments in northern Hebei and western Liaoning, China. It includes large amount of evolutionarily significant taxonomy, e.g. feathered dinosaurs, early birds, mammals and flowering plants, representing one of the most diversified terrestrial biotas of the Mesozoic and providing exceptional windows into some major fundamental issues in […]