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 Prognathodon
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Just a little history on Dinosaurs. tu can believe it o not, but it's worth looking into.
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dragones
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Abelisaurus
"Abel's lizard" has been reconstructed from a single skull.

Achillobator
This fierce raptor was discovered in modern-day Mongolia.

Acrocanthosaurus
The largest predator of the early Cretaceous period.

Adasaurus
This raptor's hind claws were unusually small.

Aerosteon
This "air-boned" dinosaur may have breathed like a bird.

Afrovenator
One of the few carnivores ever to be dug up in north Africa.

Albertonykus
A tiny, birdlike, North American dinosaur.

Albertosaurus
This carnivore was a close cousin of T. Rex.

Alectrosaurus
Few specimens of this "unmarried lizard" have been found.


Alioramus
All we know...
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Watch A Dinosaur Expert React to Dinosaur cine
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added by Andreone93
posted by GabsSaw
Pachycephalosaurs were among some of the last Dinosaur groups to appear. They lived 75-65 mya.


They are named after one of the best-known members of the group, Pachycephalosaurus.

Pachycephalosaurus means "thick-headed reptile," due to the domed and hugely thickened bone on the parte superior, arriba of its skull--like a cyclist's crash helmet.

About 15 feet long from nose to tail, Pachycephalosaurus lived in Montana, South Dakota, and Wyoming.

Stegoceras, which also lived in North America, was about 8 feet long, with a body the size of a goat.

Homalocephale was about 10 feet long and had a flatter skull. It lived in East Asia.

Pachycephalosaurs may have defended themselves por loweringtheir heads and charging at their enemies.

At breeding time, the males may have engaged in head-butting contests, as some oveja and goats do today.
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 dinosaurios known as theropods. It most likely ate small animales 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
Vascular plants are más suited to living on drier land than mosses and liverworts.

They have branching stems with tubelike walls that carry water and nutrients.

These stems and walls also mean the plants can stand tall. Vascular plants have spores (reproductive cells, like seeds)-the taller the plant, the más widely it can disperse its spores.

One of the first known vascular plants was Cooksonia. It was about 2 inches tall, with a forked stem.

Paleontologists discovered fossil remains of Cooksonia in England.

Rhynie in Scotland is one site where lots of vascular plant fossils have been found....
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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 parte superior, arriba 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 pescado was that jawed pescado had a pair of nostrils, while jawless pescado had just one.

Prehistoric sharks' jaws were fixed to the side...
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What If dinosaurios Were Still Alive Today?
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