Replica of Tyrannosaurus rex at the Senckenberg Museum.Triceratops skeleton at the Smithsonian National Museum of Natural History.A statue of Diplodocus carnegiei, outside the Carnegie Museum of Natural History.A nesting ground of Maiasaura was discovered in 1978.
Discover great deals on the many hard to find and one of a kind items available only on ebay!

Dinosaur

Dinosaurs are vertebrates (that range from crocodile-like to birds) that dominated the terrestrial ecosystem for over 160 million years from around 230 million years ago until 65 million years ago, at the end of the Cretaceous period, when all non-avian dinosaurs became extinct; and still exist today in the line of birds (avian dinosaurs). more...

HomeHome
AmphibianAmphibian
ArthropodArthropod
BirdBird
CatCat
DinosaurDinosaur
AllosaurusAllosaurus
ApatosaurusApatosaurus
ArchaeopteryxArchaeopteryx
BrachiosaurusBrachiosaurus
BrontosaurusBrontosaurus
DiplodocusDiplodocus
GigantosaurusGigantosaurus
HadrosaurusHadrosaurus
PterodactylPterodactyl
StegosaurusStegosaurus
TriceratopsTriceratops
Tyrannosaurus Rex  Tyrannosaurus Rex
VelociraptorVelociraptor
DogDog
FishFish
MammalMammal
MythologicalMythological
ReptileReptile


Knowledge about dinosaurs comes from both fossil and non-fossil records, including fossilized bones, feces, trackways, gastroliths, feathers, impressions of skin, internal organs and soft tissues. Dinosaur remains have been found on every continent on Earth, including Antarctica. This shows that all land masses were at one time connected in a super continent, called Pangaea, due to the fact that numerous fossils of the same species have been found on completely different continents. Pangaea began to break up during the Triassic period around 230 Mya.

Since the first dinosaur was recognized in the 19th century, their mounted, fossilized skeletons have become major attractions at museums around the world. Dinosaurs have become a part of world culture and remain consistently popular, especially among children. They have been featured in best-selling books and blockbuster films such as Jurassic Park, and new discoveries are regularly covered by the media. The term is also used informally to describe any prehistoric reptile, such as the pelycosaur Dimetrodon, the winged pterosaurs, and the aquatic ichthyosaurs, plesiosaurs, and mosasaurs, though none of these are dinosaurs.

The on-going dinosaur renaissance began in the 1970s and was triggered, in part, by John Ostrom's discovery of Deinonychus, an active, vicious predator that may have been warm-blooded (homoeothermic), in marked contrast to the prevailing image of dinosaurs as sluggish and cold-blooded. Vertebrate paleontology has also become a global science, with major new discoveries in previously unexploited regions, including South America, Madagascar, Antarctica, and most significantly the amazingly well-preserved feathered dinosaurs in China, which have further solidified the link between dinosaurs and their living descendants, modern birds. The widespread application of cladistics, which rigorously analyzes the relationships between biological organisms, has also proved tremendously useful in classifying dinosaurs, which are still known from an incomplete fossil record.

What is a dinosaur?

Definition

The superorder or clade "Dinosauria" was formally named by the English scientist Richard Owen in 1842. The term is a combination of the Greek words deinos ("terrible" or "fearfully great" or "formidable") and sauros ("lizard" or "reptile"). The name was chosen to express Owen's awe at the size and majesty of the extinct animals, not out of fear or trepidation at their size and formidable arsenal. Dinosaurs are extremely varied. Some were herbivorous, others carnivorous. Some dinosaurs were bipedal, others quadrupedal, while others could walk easily on both two and four legs, such as the dinosaur Ammosaurus.

Under phylogenetic taxonomy, dinosaurs are defined as all descendants of the most recent common ancestor of Triceratops and modern birds. Ornithischia is defined as all taxa sharing a more recent common ancestor with Triceratops than with Saurischia. Saurischia is defined as all taxa sharing a more recent common ancestor with birds than with Ornithischia. It has also been suggested that Dinosauria be defined as as all the descendants of the most recent common ancestor of Megalosaurus and Iguanodon

There is an almost universal consensus among paleontologists that birds are the descendants of theropod dinosaurs. Using the strict cladistical definition that all descendants of a single common ancestor are related, modern birds are dinosaurs and dinosaurs are, therefore, not extinct. Modern birds are classified by most paleontologists as belonging to the subgroup Maniraptora, which are coelurosaurs, which are theropods, which are saurischians, which are dinosaurs.

However, birds are morphologically distinct from their reptilian ancestors, and referring to birds as "avian dinosaurs" and to all other dinosaurs as "non-avian dinosaurs" is clumsy. Birds are still birds, at least in popular usage and among ornithologists. It is also technically correct under the older Linnaean classification system, which accepts taxa that exclude some descendants of a single common ancestor (paraphyletic taxa). Paleontologists mostly use cladistics in their classifications, which classifies birds as dinosaurs, but many other scientists do not. As a result, this article will use "dinosaur" as a synonym for "non-avian dinosaur", and "bird" as a synonym for "avian dinosaur".

Size

Only a tiny percentage of animals ever fossilize, and most of these remain buried in the earth. As a result, the smallest and largest dinosaurs will probably never be discovered. Even among those specimens that are recovered, few are known from complete skeletons, and impressions of skin and soft tissue are rare. Reconstructing a skeleton by comparing the size and morphology of bones to those of similar, better-known species is inexact, and restoring the muscles and other organs is, at best, educated guesswork.

While the largest and smallest dinosaurs will probably remain unknown, and a comparison between existing specimens is imprecise, it is clear that, as a group, dinosaurs were large. By dinosaur standards the sauropods were gigantic. The smallest sauropods were larger than anything else in their habitat, and the largest were an order of magnitude more massive than anything else that has ever walked the Earth.

The tallest and heaviest dinosaur known from a complete skeleton is the Brachiosaurus, which was discovered in Tanzania between 1907–12. It is now mounted in the Humboldt Museum of Berlin and is 12 m (38 ft) tall and probably weighed between 30,000–60,000 kg (30–70 short tons). The longest dinosaur is the 27 m (89 ft) long Diplodocus, which was discovered in Wyoming and mounted in Pittsburgh's Carnegie Natural History Museum in 1907.

Read more at Wikipedia.org


[List your site here Free!]

Vintage "Sinclair" Embroidered Green Dinosaur Gas Station Baseball Snapback HatVintage "Sinclair" Embroidered Green Dinosaur Gas Station Baseball Snapback Hat $20.00 �� Dinosaur Riding Bicycle Necklace �� Funky Kitsch Jewelry �� T Rex Cyclist ���� Dinosaur Riding Bicycle Necklace �� Funky Kitsch Jewelry �� T Rex Cyclist �� $9.94
Rare 1 in 100 Black Pair Ammonite Crystal Lrg 125mm Dinosaur Fossil 5.0" n24611Rare 1 in 100 Black Pair Ammonite Crystal Lrg 125mm Dinosaur Fossil 5.0" n24611 $ 00004000 71.99 Was: Previous Price $79.99 Pastasaurus Pasta Server Dinosaur Shaped Head Stir Fred Kitchen Children MealtimPastasaurus Pasta Server Dinosaur Shaped Head Stir Fred Kitchen Children Mealtim $20.89
Dinosaurs Eye to EyeDinosaurs Eye to Eye $4.18 Dragon Wars D-War (Blu-ray Dvd, 2008) Dinosaurs, Epic Battle Sci-Fi/FantasyDragon Wars D-War (Blu-ray Dvd, 2008) Dinosaurs, Epic Battle Sci-Fi/Fantasy $3.00
Dk Revealed DinosaurDk Revealed Dinosaur $3.99 Big Lot Of Vintage 60'S Playset Dinosaurs - Nice VarietyBig Lot Of Vintage 60'S Playset Dinosaurs - Nice Variety $9.99
Star-Spangled War Stories #100 (1962, Dc) Scarce! Dinosaur Cover!Star-Spangled War Stories #100 (1962, Dc) Scarce! Dinosaur Cover! $0.01 Dinosaur Bone 925 Sterling Silver Pendant 2" Ana Co Jewelry P551708Dinosaur Bone 925 Sterling Silver Pendant 2" Ana Co Jewelry P551708 $5.99
Hot Sale Halloween Unisex Adult Pajamas Kigurumi Cosplay Costume AnimalHot Sale Halloween Unisex Adult Pajamas Kigurumi Cosplay Costume Animal $13.99 to $19.99 T-Rex Action Figure – Includes Real Dinosaur Bone Fossil! NewT-Rex Action Figure – Includes Real Dinosaur Bone Fossil! New $6.39
Jurassic Park Collectible Dinosaurs Toy & Mix Lot For Parts Or Repair (As-Is)Jurassic Park Collectible Dinosaurs Toy & Mix Lot For Parts Or Repair (As-Is) $1,000.00 Vintage Dinosaur New Mexico Sew On Patch ~ A Must See!Vintage Dinosaur New Mexico Sew On Patch ~ A Must See! $7.79
Taggies Dinosaur Baby Mary Meyer Green Lovey Toy Stuffed Boy Girl Rare HtfTaggies Dinosaur Baby Mary Meyer Green Lovey Toy Stuffed Boy Girl Rare Htf $24.99 Walt Disney World Figment Purple Dinosaur Plush Toy from Imagination InstituteWalt Disney World Figment Purple Dinosaur Plush Toy from Imagination Institute $19.99
New - Green Start Giant Floor Puzzles: DinosaursNew - Green Start Giant Floor Puzzles: Dinosaurs $33.48 Harry And The Dinosaurs Play Hide And SeekHarry And The Dinosaurs Play Hide And Seek $3.99
Dinosaurs of Prey: An Educational Coloring BookDinosaurs of Prey: An Educational Coloring Book $11.25 Collecta Brachiosaurus 88121 Dinosaur Figure Educational ToyCollecta Brachiosaurus 88121 Dinosaur Figure Educational Toy $24.90
64.25Cts.100%Natural Graceful Designer Dinosaur Bone Round Cabochon Top Gemstone64.25Cts.100%Natural Graceful Designer Dinosaur Bone Round Cabochon Top Gemstone $9.99 Transformers Age Of Extinction Grimlock Stomp & Chomp Dinosaur Monster Toy D1Transformers Age Of Extinction Grimlock Stomp & Chomp Dinosaur Monster Toy D1 $18.95
Collecta Diplodocus 88622 Dinosaur Figure Educational ToyCollecta Diplodocus 88622 Dinosaur Figure Educational Toy $25.90 Kids Toy Walking Dinosaur T-Rex Toy Figure With Lights & Sounds Real MovementKids Toy Walking Dinosaur T-Rex Toy Figure With Lights & Sounds Real Movement $23.99
How To Keep Dinosaurs, Mash, Robert, Good BookHow To Keep Dinosaurs, Mash, Robert, Good Book $3.56 Dinosaur 17" Laptop Flip Sleeve Case Bag For 17.3" Acer Aspire Es1 Dell InspironDinosaur 17" Laptop Flip Sleeve Case Bag For 17.3" Acer Aspire Es1 Dell Inspiron $10.99
Clash of the Dinos: Watch Dinosaurs Do Battle! by Jinny Johnson Paperback Book (Clash of the Dinos: Watch Dinosaurs Do Battle! by Jinny Johnson Paperback Book ( $9.95 Dinosaur vs. the LibraryDinosaur vs. the Library $3.99
Raptors!: The Nastiest DinosaursRaptors!: The Nastiest Dinosaurs $4.14 Collecta Stegosaurus 88576 Dinosaur Figure Educational ToyCollecta Stegosaurus 88576 Dinosaur Figure Educational Toy $24.90
Metal Alphabet Cutting Dies Stencil Diy Scrapbooking Photo Album Paper Card GiftMetal Alphabet Cutting Dies Stencil Diy Scrapbooking Photo Album Paper Card Gift $0.99 to $3.59 Unused Linen Brontosaurus At Dinosaur Park Rapid City South Dakota Sd c7919Unused Linen Brontosaurus At Dinosaur Park Rapid City South Dakota Sd c7919 $19.99
Secrets of the Dinosaur World: Come Face-to-Face with Jurassic Beasts and.Secrets of the Dinosaur World: Come Face-to-Face with Jurassic Beasts and. $4.18 New Ravensburger Puzzle Dinosaurs 1997 60 Pieces {012115}New Ravensburger Puzzle Dinosaurs 1997 60 Pieces {012115} $9.97 Was: Previous Price $14.25
Metal Earth Triceratops Dinosaur Skeleton 3D Model KitMetal Earth Triceratops Dinosaur Skeleton 3D Model Kit $6.00 Was: Previous Price $10.00 Disney The Good Dinosaur Spot Caveman Kid Plush 6" TallDisney The Good Dinosaur Spot Caveman Kid Plush 6" Tall $8.99 Was: Previous Price $14.99
Brothers Who Play Together Wall Quote Art Home Decor Vinyl Decal Dinosaur LoveBrothers Who Play Together Wall Quote Art Home Decor Vinyl Decal Dinosaur Love $16.63 1x Little Dinosaur Crystal Tpu soft case cover for Apple iphone 7 cellphone1x Little Dinosaur Crystal Tpu soft case cover for Apple iphone 7 cellphone $0.01
Dinosaur Comforter Set Twin Size Bedding Sheets Kids Boys Bedroom Blue BlocksDinosaur Comforter Set Twin Size Bedding Sheets Kids Boys Bedroom Blue Blocks $61.01 Nb1 Dinosaur Bone Tiff+Any Garnet Blue Topa 925 Sterling Silver Plated NecklaceNb1 Dinosaur Bone Tiff+Any Garnet Blue Topa 925 Sterling Silver Plated Necklace $23.49
3D Removable Wall Vinyl Sticker Comics Marvel Decal Art Home Kid Room Decoration3D Removable Wall Vinyl Sticker Comics Marvel Decal Art Home Kid Room Decoration $4.89 Metal Earth Pteranodon Dinosaur Skeleton 3D Model KitMetal Earth Pteranodon Dinosaur Skeleton 3D Model Kit $6.00 Was: Previous Price $10.00
Jim Henson's Dinosaur Train: The Wing Kings Dvd New
00004000Jim Henson's Dinosaur Train: The Wing Kings Dvd New 00004000 $7.01 Old Navy Costume-Zebra,Butterfly,F ireman,Unicorn,Leopard,Din osaur NwtOld Navy Costume-Zebra,Butterfly,F ireman,Unicorn,Leopard,Din osaur Nwt $10.95 to $15.95
1x pink Dinosaur Crystal Tpu soft case cover for Apple iphone 7 4.7"cellphone1x pink Dinosaur Crystal Tpu soft case cover for Apple iphone 7 4.7"cellphone $0.06 #4 28" Lovely Cartoon Dinosaur Universal Wheel Abs+Pc Suitcase Pull Rod Box Llx#4 28" Lovely Cartoon Dinosaur Universal Wheel Abs+Pc Suitcase Pull Rod Box Llx $263.11
Disney Infinity 3.0: Tomorrowland & The Good Dinosaur Power Disc Pack NewDisney Infinity 3.0: Tomorrowland & The Good Dinosaur Power Disc Pack New $4.99
Click to see more Dinosaur items at ebay.com
Prices current as of last update, 06/23/17 9:00pm.

Home Contact Resources Exchange Links eBay