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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

OneLook, Free Dictionary, Wiktionary


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

Encyclopædia Britannica


Dinosaurs Science Tracer Bullet (Library of Congress)
Dinosaurs Portal (Wikipedia)


Dinosaurs (Wolfram Alpha)



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Giant dinosaur slims down… a bit (BBC)
Titanosaur (Wikipedia)




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Dreadnoughtus (Kenneth Lacovara)
Dreadnoughtus (Wikipedia)




Mary Anning, An Amazing Fossil Hunter (Smithsonian Magazine)


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Dinosaurs (Natural History Museum in London)

The World of Dinosaurs (Museum für Naturkunde in Berlin)
Natural History (Google Arts & Culture)

Dino Tour (American Museum of National History)
Dinosaurs Explained (YouTube Channel, American Museum of National History)
Dinosaurs (Smithsonian National Museum of Natural History)


WorldCat, Library of Congress, UPenn Online Books, Open Library




Dino Links (University of California Museum of Paleontology)


OER Commons: Open Educational Resources



Scientific American, Science Daily, Phys.org, NPR Archives









Fictional Dinosaurs (List, Wikipedia)
Novels about dinosaurs (Category, Wikipedia)
Dinosaurs in fiction (Category, Wikipedia)




OEDILF: The Omnificent English Dictionary In Limerick Form


Song Lyrics


More News …

Dinosaurs News -- ScienceDaily All about dinosaurs. Read about dinosaur discoveries including gigantic meat-eating dinosaurs, earliest dinosaurs and more. Dinosaur pictures and articles.

  • CT uncovers bone disease in Tyrannosaurus rex jaw
    on December 1, 2021 at 1:51 pm

    Researchers have identified bone disease in the fossilized jaw of a Tyrannosaurus rex using a CT-based, nondestructive imaging approach. The imaging method could have significant applications in paleontology, researchers said, as an alternative to fossil assessment methods that involve the destruction of samples.

  • Novel approach to a plant-based diet, unique to...
    on November 11, 2021 at 1:04 pm

    A new study uncovers a novel approach to a plant-based diet, unique to long-necked dinosaurs.

  • New species of iguanodontian dinosaur discovered...
    on November 11, 2021 at 12:54 pm

    Discoveries of iguanodontian dinosaurs from the Isle of Wight have previously only been assigned to Iguanodon or Mantellisaurus . The diversity of dinosaurs in the Early Cretaceous of the UK is much greater than previously thought.

  • 'Cold bone': Researchers discover first dinosaur...
    on November 8, 2021 at 4:48 pm

    The two-legged dinosaur Issi saaneq lived about 214 million years ago in what is now Greenland. It was a medium-sized, long-necked herbivore and a predecessor of the sauropods, the largest land animals ever to live. The name of the new dinosaur pays tribute to Greenland's Inuit language and means "cold bone".

  • Tiny pterosaurs dominated Cretaceous skies
    on October 27, 2021 at 4:20 pm

    The newly hatched juveniles of large and gigantic pterosaurs likely out-competed other smaller adult pterosaur species to dominate the Late Cretaceous period around 100 million years ago, a new study has found.

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.

  • Could we really deflect an asteroid heading for...
    on November 26, 2021 at 4:10 pm

    A NASA spacecraft the size of a golf cart has been directed to smash into an asteroid, with the intention of knocking it slightly off course. The test aims to demonstrate our technological readiness in case an actual asteroid threat is detected in the future.

  • Remains of 'very rare' dinosaur species...
    on November 18, 2021 at 9:28 pm

    Remains of a toothless, two-legged dinosaur species that lived some 70 million years ago has been discovered in Brazil, researchers said Thursday, calling it a "very rare" find.

  • Revolution in imaging with neutrons
    on November 18, 2021 at 3:06 pm

    An international research team at the Research Neutron Source Heinz Maier-Leibnitz (FRM II) of the Technical University of Munich (TUM) have developed a new imaging technology. In the future this technology could not only improve the resolution of neutron measurements by many times but could also reduce radiation exposure during X-ray imaging.

  • The impact of flowering plants on the evolution...
    on November 17, 2021 at 3:05 pm

    Researchers at the University of Bristol have identified the huge impact of flowering plants on the evolution of life on Earth.

  • An asteroid bigger than Philly's City Hall will...
    on November 15, 2021 at 5:36 pm

    A massive asteroid will whiz past the Earth on Saturday, but hold any thoughts of disaster movies.


Here are links to pages about closely related subjects.

Knowledge Realm


Sphere Land, Ice, Water (Ocean), Air
Ecosystem Forest, Grassland, Desert, Arctic, Aquatic

Life Cell, Gene, Tree of Life
Plant Flower, Tree
Invertebrate Cuttlefish, Octopus, Ant, Bee, Butterfly, Spider, Lobster
Vertebrate Fish, Seahorse, Ray, Shark, Frog, Turtle, Tortoise, Dinosaur
Bird, Ostrich, Owl, Crow, Parrot
Mammal Bat, Rabbit, Giraffe, Camel, Horse, Elephant, Mammoth
Whale, Dolphin, Walrus, Seal, Polar Bear, Bear, Cat, Tiger, Lion, Dog, Wolf
Monkey, Chimpanzee, Human


1.   The resources on this page are are organized by a classification scheme developed exclusively for Cosma.