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 Dilophosaurus
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This Dinosaurs تصویر contains triceratops.

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Source: Felipe Alves Elias
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posted by dragonsmemory
Could آپ have survived as a dinosaur? Answer these سوالات to find out.

1. آپ are a hadrosaur living in North America during the late Cretaceous period. آپ have come to a turning and must either go left, where a herd of ceratopsians awaits you, یا turn right, where a lone Albertasaurus is standing. Which way do آپ turn?
A. Left
B. Right

2. آپ are a Gallimimus living in the Gobi Desert 70 million years ago. آپ see a Tarbosaurus in the distance, slowly coming your way. What should آپ do?
A. Run away
B. Hide

3. آپ are a Leaellynasaura living in southern Australia during the Cretaceous period....
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posted by GabsSaw
Dilophosaurus probably weighed about 1,100 pounds--as much as the biggest polar bears today.

Eustreptospondylus means "well-curved backbone". This is due to the arrangement of its spine sa seen in its fossils.

The remains of 60 Allosaurus were found in the Cleveland-Lloyd Dinosaur Quarry in Utah.

According to some experts, Ornitholestes may have had a slight ridge یا crest on its nose. Other experts disagree.

Oviraptor had two bony spikes inside its mouth that it may have used to crack open eggs when it closed its jaws.

On each foot, a Dromaeosaur had a large, curved claw that it could سوئنگ, جھول in...
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posted by GabsSaw
Coelophysis was a small, agile dinosaur that lived at the start of the Age of Dinosaurs, about 220 mya.

A huge collection of Coelophysis fossils were found in the 1940s, at a place called Ghost Ranch, New Mexico.

Hundreds of Coelophysis fossils were preserved together at Ghost Ranch---possibly a herd that drowned in a flood.

Coelophysis was almost 10 feet in total length. Its slim, lightweight build meant that it probably weighed 55-60 pounds.

Coelophysis belonged to the group of dinosaurs known as theropods. It most likely ate small animals such as insects, worms, and lizards.

Long, powerful back legs allowed Coelophysis to run fast.

The front limbs were like arms, each with a hand bearing three large, strong, sharp-clawed fingers for grabbing prey.

The birdlike skull was filled with small, sharp teeth.

Coelophysis means "hollow form". It was called that because some of its bones were hollow, like the bones of birds making it lightly built.
posted by GabsSaw
The first dinosaur appeared around 230-225 mya, in the middle of the Triassic period.

These dinosaurs were small-to-medium meat eaters with sharp teeth and claws. They ran quickly on their two longer back legs .

Fossils of Herrerasaurus تاریخ from 228 mya and were found near San Juan in Argentina, South America.

Herrarasaurus was about 10 feet in total length, and probably weighed 200 pounds.

At about the same time and in the same place as Herrarasaurus, there lived a similar-shaped dinosaur named Eoraptor, which was only 5 feet long.

The name Eoraptor means "dawn plunderer" یا "early thief".

Staurikosaurus was a meat eater similar to Herrarasaurus. It is known to have lived about the same time, in present دن Brazil, South America.

Procompsognathus was another early meat eater. It lived in the late Triassic period in Germany.

Pisanosaurus lived in Argentina in the late Triassic Period, and was only 3 feet long. It may have been a plant eater.
posted by GabsSaw
Liverworts grew on mats of blue-green algae, which trapped nitrogen from the air. They used this nitrogen to grow.

Spriggina has a curved, shieldlike end to one part of its body. Some paleontologists think this was its head, while others think it was an anchor that secured it to the seabed.

Hemicyclaspis had eyes on سب, سب سے اوپر of its head. This suggests it lived on the seabed and used its eyes to keep a look out for predators above.

Another difference between jawed and jawless مچھلی was that jawed مچھلی had a pair of nostrils, while jawless مچھلی had just one.

Prehistoric sharks' jaws were fixed to the side...
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