Interesting Facts about Dinosaurs

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We're starting another Earth research contest!
This time you have to find some short and interesting information about dinosaurs!
Also you ave to make your own drawings!
You have one week to post your researches!
The winners get cool prizes!

Hiki

One of the best examples of soft tissue impressions in a fossil dinosaur was discovered in Petraroia, Italy. The discovery was reported in 1998, and described the specimen of a small, very young coelurosaur, Scipionyx samniticus. The fossil includes portions of the intestines, colon, liver, muscles, and windpipe of this immature dinosaur.

In the March 2005 issue of Science, the paleontologist Mary Higby Schweitzer and her team announced the discovery of flexible material resembling actual soft tissue inside a 68-million-year-old Tyrannosaurus rex leg bone from the Hell Creek Formation in Montana. After recovery, the tissue was rehydrated by the science team.

When the fossilized bone was treated over several weeks to remove mineral content from the fossilized bone marrow cavity (a process called demineralization), Schweitzer found evidence of intact structures such as blood vessels, bone matrix, and connective tissue (bone fibers). Scrutiny under the microscope further revealed that the putative dinosaur soft tissue had retained fine structures (microstructures) even at the cellular level.


PS this is on my D.A.D.S pc

ok so we all know that the T-rex has a big bad reputation as a killing machine well I was doing resaerch and apparently there has been evidence unveiled to show that T-rex was a scavneger instead of a predator thus putting an end to the fearsome rep. of the T-rex. i'm sorry about not putting a drawing with it b/c i'm not a citizen. and scientist have been making discovery's that could mean that most different specie's of dinosaur's were actually the same but at different stages of the growth cycle

When scientists talk of dinosaurs, they mean a special kind of creature that lived on land during the Triassic, Jurassic, or Cretaceous period. But a lot of people say "dinosaur" when they mean any prehistoric creature, such as sea creatures or pteradactyls. The Smartest Dinosaur was ... The Troodon! Scientists measure smartness by figuring out how big an animal compared to its body. This is called "encephalization quotient." Troodon wins! Even so, they think he was only about as smart as a modern possum. But for a dinosaur, that was pretty smart! The Dumbest Dinosaur was ... The stegosaurus! It had a brain as big as a walnut in a body weighing nearly two tons! "Dumb" isn't a nice word, even if it is a dinosaur fact. Let's just call Stegosaurus "less smart than a Troodon"! The Fastest Dinosaur was ... Coelophysis and other Ornithomimosaurs. Scientists think these dinosaurs ran up to 30 miles per hour for short distances! The Biggest Dinosaurs were: Saurpods. Seismosaurus was 165 feet long (it's tail helped!). Arentinosaurus was the heaviest at 100 tons. The Brachiosaurus was 39 feet high (which helped it reach branches in trees). Giganotosaurus was the largest hunting dinosaur, at 46 feet long and up to 8 tons! The Smallest Dinosaur was the Saltopus. It was only 3 feet long, and weighed about five pounds.
i hope i win my name on chobots is jermy777

dinasours

From 230 million to 65 million years ago, reptiles called dinosaurs lived on the Earth. They varied tremendously in size and shape. Some were about the size of a dog but others were huge, weighing many tons. The largest species ate plants, but others were flesh eaters. Most were four-legged, but many walked and ran on their hind legs only. Dinosaur fossils have been discovered nearly worldwide, and major new finds are continually reported. These fossils include bones, eggs, footprints, and even traces of feathers. Based on their study of fossils, scientists have been able to classify dinosaurs into two main groups, the Saurischia ("lizard hips") and the Ornithischia ("bird hips"). Also using fossils as a guide, scientists have created life-size models that show how different events in a dinosaur's life may have occurred. But many mysteries remain. One of the biggest concerns the disappearance of the dinosaurs. Scientists have proposed various theories to account for the extinction of these fascinating animals, but none have been conclusively proven.
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Dinosaur (Greek for "terrible lizard") is the term given to various kinds of extinct reptiles of the Mesozoic Era, from 230 to 65 million years ago. During the era these often (but not always) very large reptiles were the dominant land animals on Earth. The term was proposed as a formal zoologic name in 1842 by the British anatomist Sir Richard Owen, in reference to large fossil bones unearthed in southern England, but it is used today only in an informal sense. The animals are classified in two formal categories, the orders Saurischia and Ornithischia, within the reptile subclass Archosauria.
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Thousands of dinosaur remains have been found nearly worldwide. The earliest discoveries were for many years attributed to two Englishmen. The first, Gideon Mantell, a doctor, made his find in Sussex, England, in 1822 and called it Iguanodon ("iguana tooth"). The second, the Rev. Willam Buckland, made his find near Oxford, England, and called it Megalosaurus ("great lizard"). In fact, fossil remains had already been discovered in 1818 at Windsor, Conn., by Solomon Ellsworth, Jr. The remains, reported as human by Nathan Smith in the 1820 issue of the American Journal of Sciences and Arts, were only recently recognized as pertaining to the Late Triassic/Early Jurassic prosauropod Anchisaurus.
---------------------------------------------------------------------------------------------------------------------------------------------------------------The Tyrannosaurus was a meat-eating dinosaur that lived about 70 million years ago. The fiercest and last of the now-extinct carnivorous dinosaurs, it was 50 feet (15 m) long, 18 feet (5.5 m) high, and ahad a huge head armed with dozens of sharp, flesh-tearing teeth that were up to 8 inches ( 20 cm) (Grolier Interactive Inc.) [

[b]here is some pics





















































by:sara1001 i hope u like it

Why did Dinosaurs Look So Weird? Dinosaurs were around for millions of years. During that time they changed to suit their environment and conditions. Horns, plates, thorns, spines, long necks, claws, each of these served a purpose for that dinosaur. If you think about it, dinosoaurs were around for a little more than 200 million years. Human beings have been around for about 120,000. Think how weird WE might look in another million years or so!

What Killed the Dinosaurs (Dinosaurs Cause for Extinction): No one really knows! Scientists have several theories:

Meteor hits the earth!
Lots of volcanic eruptions!
Climate Changes (over a long period of time)

What do Dinosaur eggs look like? Dinosaur eggs are many shapes and sizes. Some are up to 16" long or more. But bigger eggs didn't always mean bigger dinosaurs. Some very large dinosaurs had small eggs. The first dinosaur egg fossils were found in France in 1869. Many dinosaur eggs found still have their original shells.




First picture ... I'll try to draw better pictures later






New picture

[b]Dinosaurs (Greek: δεινόσαυρος, deinosauros) were the dominant terrestrial vertebrate animals for over 160 million years, from the late Triassic period, about 230 million years ago (Ma), until the end of the Cretaceous period, about 65 Ma, when most of them became extinct in the Cretaceous–Tertiary extinction event. The fossil record indicates that birds evolved from theropod dinosaurs during the Jurassic period, and most paleontologists regard them as the only clade of dinosaurs to have survived until the present day.

The dinosaurs were among the most successful animals ever to live on the Earth. Their reign lasted over 100 million years - and if birds evolved from the dinosaurs, then their descendents are still alive today.

Dinosaurs were an extremely varied group of animals. Paleontologists have identified over 500 distinct genera and more than 1,000 different species of dinosaur, and remains have been found on every continent on Earth. Some dinosaurs were herbivorous, others carnivorous. Some were bipedal, others quadrupedal, and others were able to shift between these body postures. Many species developed elaborate skeletal modifications such as bony armor, horns or crests. Although generally known for their large size, many dinosaurs were human-sized or even smaller. Most major groups of dinosaurs are known to have built nests and laid eggs, suggesting an oviparity similar to that of modern birds.

The term "dinosaur" was coined in 1842 by Sir Richard Owen and derives from Greek δεινός (deinos) "terrible, powerful, wondrous" + σαῦρος (sauros) "lizard". Through the first half of the 20th century, most of the scientific community believed dinosaurs to have been sluggish, unintelligent cold-blooded animals. Most research conducted since the 1970s, however, has supported what has since become the scientific consensus view: that dinosaurs were active animals with elevated metabolisms and numerous adaptations for social interaction.

Since the first dinosaur fossils were recognized in the early nineteenth century, mounted dinosaur skeletons have become major attractions at museums around the world. Dinosaurs have become a part of world culture and remain consistently popular. They have been featured in best-selling books and films such as Jurassic Park, and new discoveries are regularly covered by the media. As a result, the word "dinosaur" has entered the common vernacular, although its use and meaning in colloquial speech may be inconsistent with modern science. In English, for example, "dinosaur" is commonly used to describe anything that is impractically large, slow-moving, obsolete, or bound for extinction.
THANKS TO WIKIPEDIA!

My Chobots Name: Tenpeny
I Hope I Win!

And:
http://www.dinosaurtypes.net/images/home_page/DinosaursRef.gif

Dinosaurs were the dominant terrestrial vertebrate animals for over 160 million years, from the late Triassic period, about 230 million years ago, until the end of the Cretaceous period, about 65 Ma, when most of them became extinct in the Cretaceous–Tertiary extinction event. The fossil record indicates that birds evolved from theropod dinosaurs during the Jurassic period, and most paleontologists regard them as the only clade of dinosaurs to have survived until the present day.

Dinosaurs were an extremely varied group of animals. Paleontologists have identified over 500 distinct genera and more than 1,000 different species of dinosaur, and remains have been found on every continent on Earth. Some dinosaurs were herbivorous, others carnivorous. Some were bipedal, others quadrupedal, and others were able to shift between these body postures. Many species developed elaborate skeletal modifications such as bony armor, horns or crests. Although generally known for their large size, many dinosaurs were human-sized or even smaller. Most major groups of dinosaurs are known to have built nests and laid eggs, suggesting an oviparity similar to that of modern birds.

Since the first dinosaur fossils were recognized in the early nineteenth century, mounted dinosaur skeletons have become major attractions at museums around the world. Dinosaurs have become a part of world culture and remain consistently popular. They have been featured in best-selling books and films such as Jurassic Park, and new discoveries are regularly covered by the media. As a result, the word "dinosaur" has entered the common vernacular, although its use and meaning in colloquial speech may be inconsistent with modern science. In English, for example, "dinosaur" is commonly used to describe anything that is impractically large, slow-moving, obsolete, or bound for extinction.

i hope i win.
p.s - i want to post pic here but it dont upload it to me then if you want to see it go to https://2img.net/h/oi35.tinypic.com/ezius.jpg

~v_chobot

Good Luck For Everyone!

Best known of the dinosaurs, Tyrannosaurus rex was one of the most awesome creatures that have walked on the earth. T-rex was one of the largest meat - eating dinosaurs, having a skull up to 5ft long and many sharp teeth reaching lengths of 6in (15cm). The first complete Tyrannosaurus rex T-rex skeleton was discovered in 1902, and many great examples have been unearthed over the last fifteen years.

TIME - 65 - 68MYA, Late Cretaceous period.
RANGE - USA Colorado, Montana, N. Dakota
New Mexico, Wyoming.
Canada Alberta, Saskatchewan.
DIET - The T-rex was a carnivore.
SIZE - Height up to 20ft (6m) and lengths up to 49ft(15m)..
WEIGHT - 6.5 US tons.

T - Rex can stand for Tyrannosaurus and Tyrant Lizard.

Like other tyrannosaurids, Tyrannosaurus was a bipedal carnivore with a massive skull balanced by a long, heavy tail. Relative to the large and powerful hindlimbs, Tyrannosaurus forelimbs were small, though unusually powerful for their size, and bore two clawed digits. Although other theropods rivaled or exceeded Tyrannosaurus rex in size, it was the largest known tyrannosaurid and one of the largest known land predators, measuring up to 13 metres (43 ft) in length,[1] up to 4 metres (13 ft) tall at the hips, and up to 6.8 metric tons (7.5 short tons) in weight.By far the largest carnivore in its environment, Tyrannosaurus rex may have been an apex predator, preying upon hadrosaurs and ceratopsians, although some experts have suggested it was primarily a scavenger. The debate over Tyrannosaurus as apex predator or scavenger is among the longest running debates in paleontology.

More than 30 specimens of Tyrannosaurus rex have been identified, some of which are nearly complete skeletons. Soft tissue and proteins have been reported in at least one of these specimens. The abundance of fossil material has allowed significant research into many aspects of its biology, including life history and biomechanics. The feeding habits, physiology and potential speed of Tyrannosaurus rex are a few subjects of debate. Its taxonomy is also controversial, with some scientists considering Tarbosaurus bataar from Asia to represent a second species of Tyrannosaurus and others maintaining Tarbosaurus as a separate genus. Several other genera of North American tyrannosaurids have also been synonymized with Tyrannosaurus.

Kingdom: AnimaliaPhylum: ChordataClass: ReptiliaSuperorder: DinosauriaOrder: Saurischia
Superfamily: TyrannosauroideaFamily: TyrannosauridaeSubfamily: Tyrannosaurinae
Genus: Tyrannosaurus

- Artic288

Thanks to: Prehistory.com and Wikipedia.org! Here is a drawing by me of a T - Rex! - http://3.bp.blogspot.com/_5puv0zGnXI0/SuHNzS3CMFI/AAAAAAAAAXI/g2owxQ3V1pk/s1600-h/Earth+Dino+Research.bmp

Millions of years ago, long before there were any people, there were dinosaurs. Dinosaurs were one of several kinds of prehistoric reptiles that lived during the Mesozoic Era, the "Age of Reptiles."

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The dinosaurs dominated the Earth for over 165 million years, but mysteriously went extinct 65 million years ago. Paleontologists study their fossil remains to learn about the amazing prehistoric world of dinosaurs.



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Dinosaurs were land-dwelling reptiles that walked with an erect stance. Their unique hip structure caused their legs to stick out from under their bodies, and not sprawl out from the side (like other reptiles ). When dinosaurs first evolved from more primitive archosaurs, they were bipedal (walked on two legs). Much later, some dinosaur groups returned to a four-legged stance, having hind legs much larger than their front legs .



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There were lots of different kinds of dinosaurs that lived at different times. Some were HUGE, some were small. Some walked on two legs, some walked on four . Some were speedy , and some were slow and lumbering . Some were carnivores and some were herbivores . Some were armor-plated, some had thick, bumpy skin, some had horns , some even had primitive feathers.



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No one knows what colors or patterns they were, how they sounded, how they behaved, how they mated, or even how to tell whether a fossil came from a male or a female dinosaur.



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Dinosaurs suddenly became extinct about 65 million years ago, at the end of the Cretaceous period, which was a time of high volcanic and tectonic activity. There are a lot of theories why the extinction occurred. The most widely accepted theory is that an asteroid impact caused major climactic changes which the dinosaurs couldn't adapt to.

All that's left of the dinosaurs are fossils.

Dinosaurs usually walked on their toes; the scientific term for this is digitigrade. Other animals that are digitigrade include dogs, cat, and chickens. There is a pad of tissue on the back of the feet on these animals that acts like a shock absorber. People, bears, and crocodiles walk differently; they are plantigrade (flat-footed). Dinosaurs were slightly pigeon-toed; their toes pointed inwards.

Some dinosaurs moved around on four legs (these are called quadrupeds), and some on two legs (these are called bipeds). Others may have run on two legs but walked and grazed on all four legs. Some dinosaurs were slow moving and others were speedy, depending on their anatomy. A few of the late, bird-like dinosaurs may have used their short, feathered arms to help speed up their running and perhaps glide from trees to the ground. Dinosaurs probably used their tails for balance while moving and some may have used their tails for quickly shifting their balance in quick turns.

Many dinosaurs had dewclaws (also called a hallux), a small, functionless claw that didn't hit the ground. There has been some discussion on whether or not the massive, short-armed theropods (like T. rex, Giganotosaurus, and Allosaurus) could run very fast because if they fell, their short arms would not break their fall and they would be badly injured (James Farlow, 1995). This meant that these large theropods were slow, lumbering animals.

Dr. Bruce Rothschild, of the Arthritis Center of Northeast Ohio, has found evidence of 14 fractured ribs in an Allosaurus that reflect healed injuries that were probably received in falls. These were most likely bellyflops that happened while running while running (as reported in the April 16, 1998 New Scientist).

An x-ray analysis of the Allosaurus fossil indicated that the Allosaurus ribs near the scapula (the shoulder bone) were cracked and had healed. The Allosaurus was capable of recovering after many severe forward tumbles that probably occurred while it was running. So the suggestion that perhaps the large short-armed theropods were not capable of running because they couldn't recover after a fall apparently wasn't so, at least for Allosaurus - this Allosaurus did recover many times after bad tumbles.

In 1995 James Farlow of Indiana-Purdue University argued that a large T. rex could run no faster than 20 mph (32 kph), because if it did, a fall would probably be so severe as to kill it. T. rex weighed about 6 tons and was up to 20 feet (6 m) tall but Allosaurus was slightly smaller, about 3 tons and 16.5 feet (5 m) long. Farlow says that Rothschild's analysis is consistent with his theory since Allosaurus was smaller than T. rex (its smaller mass would make the impact much less powerful so the animal may have been able to recover after a running fall).here is the photo i maked https://i.servimg.com/u/f87/14/27/41/18/dino10.jpg

Dinosaurs were several types of extinct prehistoric reptile that lived 230–65 million years ago. But did they completely die out or do they live among us today in the form of birds? And could scientists recreate a T. rex from fossilised amber? Find out the answers to these and many other questions in our collection of articles, fact files and webcasts. Plus discover the secrets of other extinct species, such as the dodo and the giant sloth.
Thus, we see that dinosaurs lived during the era known as Mesozoic (meaning "middle life"), which consists of three periods: Triassic (three-part rock system) 245-208 mya (million years ago); Jurassic (Jura Mountains) 208-144 mya; and Cretaceous (chalk) 144-66.4 mya. In Maryland, dinosaur fossils are found in rock units known as the Newark Group, the Potomac Group, and the Severn Formation (named for Newark, New Jersey, the Potomac River, and the Severn River, respectively). The fact that these units cover much but not all of the Mesozoic, or "dinosaur time," should not be taken to mean that there were no dinosaurs living here during the missing time periods, but only that rock units from those time periods were buried, removed by erosion, or never deposited. Furthermore, outcrops of rocks containing dinosaur fossils are not restricted by state boundaries; thus, a dinosaur from rock units in a neighboring state or the District of Columbia may occasionally be mentioned.

Hope i win
and Here is My Drawning :

https://2img.net/h/oi36.tinypic.com/f0vjf7.jpg

And my chobots name is Bube07 not Bube077 XD

Was the Lochness Monster a plesiosaur or myth? Rent

While it may seem a little silly to discuss mythical creatures on the Daily Dino Fact, Rent makes a very good observation. When most people think of the Loch Ness Monster, they picture what we know to be a plesiosaur. How did this happen?

Supposedly taken by Colonel Robert Wilson in 1934, the famous “surgeon photo” shows what looks like a plesiosaur. Another man admitted to helping build the model shown in the picture, but the image of the Loch Ness monster has consistently been thought of as the beautiful ancient sea reptile we know as Plesiosaur.

Although a living, breathing plesiosaur would be a wonderful sight to see, it is near impossible that one have survived extinction, especially in a remote area like Loch Ness with no other plesioaurs to reproduce with. They were giant creatures and would have required a lot of food and space to survive.

Humans have been wrong about this before though. The ancient armored fish Coelacanth was thought to have been extinct for millions of years until it was found in South Africa in 1938.
( I'm sorry, I didn't paint a picture cause I didn't have paint)


-BY ANEELIO

Hi!
This is beebopadoobop's entry:



And this is my entry



Enjoy

Size
Main article: Dinosaur size

Scale diagram comparing the largest known dinosaurs in four suborders and a human.While the evidence is incomplete, it is clear that, as a group, dinosaurs were large. Even by dinosaur standards, the sauropods were gigantic. For much of the dinosaur era, 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 since walked the Earth. Giant prehistoric mammals such as the Indricotherium and the Columbian mammoth were dwarfed by the giant sauropods, and only a handful of modern aquatic animals approach or surpass them in size – most notably the blue whale, which reaches up to 173000 kg (381000 lb) and over 30 meters (100 ft) in length.[46] There are several proposed advantages for the large size of sauropods, including protection from predation, reduction of energy use, and longevity, but it may be that the most important advantage was dietary. Large animals are more efficient at digestion than small animals, because food spends more time in their digestive systems. This also permits them to subsist on food with lower nutritive value than smaller animals. Sauropod remains are mostly found in rock formations interpreted as dry or seasonally dry, and the ability to eat large quantities of low nutrient browse would have been advantageous in such environments.[47]

Most dinosaurs, however, were much smaller than the giant sauropods. Current evidence suggests that dinosaur average size varied through the Triassic, early Jurassic, late Jurassic and Cretaceous periods.[32] Theropod dinosaurs, when sorted by estimated weight into categories based on order of magnitude, most often fall into the 100 to 1000 kilogram (220 to 2200 lb) category, whereas recent predatory carnivorans peak in the 10 to 100 kilogram (22 to 220 lb) category.[48] The mode of dinosaur body masses is between one and ten metric tonnes.[49] This contrasts sharply with the size of Cenozoic mammals, estimated by the National Museum of Natural History as about 2 to 5 kilograms (5 to 10 lb).[50]

Dinosaur Facts



Dinosaurs were animals that lived millions of years ago.



Many dinosaurs were very big. But some were as small as chickens are today.



Most dinosaurs ate only plants. Some dinosaurs ate other animals. They were meat eaters.



Scientists aren't sure what color dinosaurs were. Some think dinosaurs might have been as colorful as many birds are today.



In 1902, part of a huge skeleton was uncovered in Montana. Later, another was found in Wyoming. From these bones the American paleontologist Henry Fairfield Osborn drew up the first pictures of this giant creature. He named it Tyrannosaurus Rex (meaning 'king of the tyrant reptiles') because it was the biggest meat - eating dinosaur then known to have lived on Earth.



Scientists in Argentina, South America, claim to have found the world's oldest dinosaur. This creature, called Herrarasaurus, is said to be 230 million years old.



Dinosaurs sometimes had accidents, and fossil bones have been found with fractures in them.



The most complete skeleton of a Stegosaurus ever found has been dug up at the foot of the Rocky Mountains in Colorado. It had to be hauled out of the earth by an army helicopter.



Your dentist's drill has other uses. In the laboratory, scientists often use dental drills to clear and prepare dinosaur bones.



Tracks left in the mud by dinosaurs provide clues as to how quickly they moved. By measuring the distance between footprints, experts have worked out that some dinosaurs could have reached speeds up to 25 mph.



Velociraptor was probably very fierce. A fossil found in Utah, shows its claws may have been up to 15 inches in length--as long as a three-year-old child's arm. These claws formed very effective hooks with which to hold prey.


Main article: Evolution of dinosaurs

Dinosaur evolution after the Triassic follows changes in vegetation and the location of continents. In the Late Triassic and Early Jurassic, the continents were connected as the single landmass Pangaea, there was a worldwide dinosaur fauna mostly composed of coelophysoid carnivores and prosauropod herbivores. Gymnosperm plants (particularly conifers), a potential food source, radiated in the Late Triassic. Prosauropods did not have sophisticated mechanisms for processing food in the mouth, so must have employed other means of breaking down food farther along the digestive tract. The general homogeneity of dinosaurian faunas continued into the Middle and Late Jurassic, where most localities had predators consisting of ceratosaurians, spinosauroids, and carnosaurians, and herbivores consisting of stegosaurian ornithischians and large sauropods. Examples of this include the Morrison Formation of North America and Tendaguru Beds of Tanzania. Dinosaurs in China show some differences, with specialized sinraptorid theropods and unusual, long-necked sauropods like Mamenchisaurus. Ankylosaurians and ornithopods were also becoming more common, but prosauropods had become extinct. Conifers and pteridophytes were the most common plants. Sauropods, like the earlier prosauropods, were not oral processors, but ornithischians were evolving various means of dealing with food in the mouth, including potential cheek-like organs to keep food in the mouth, and jaw motions to grind food.[40] Another notable evolutionary event of the Jurassic was the appearance of true birds, descended from maniraptoran coelurosaurians.
An Illustration of 18 species of basal ceratopsia to scale.

By the Early Cretaceous and the ongoing breakup of Pangaea, dinosaurs were becoming strongly differentiated by landmass. The earliest part of this time saw the spread of ankylosaurians, iguanodontians, and brachiosaurids through Europe, North America, and northern Africa. These were later supplemented or replaced in Africa by large spinosaurid and carcharodontosaurid theropods, and rebbachisaurid and titanosaurian sauropods, also found in South America. In Asia, maniraptoran coelurosaurians like dromaeosaurids, troodontids, and oviraptorosaurians became the common theropods, and ankylosaurids and early ceratopsians like Psittacosaurus became important herbivores. Meanwhile, Australia was home to a fauna of basal ankylosaurians, hypsilophodonts, and iguanodontians. The stegosaurians appear to have gone extinct at some point in the late Early Cretaceous or early Late Cretaceous. A major change in the Early Cretaceous, which would be amplified in the Late Cretaceous, was the evolution of flowering plants. At the same time, several groups of dinosaurian herbivores evolved more sophisticated ways to orally process food. Ceratopsians developed a method of slicing with teeth stacked on each other in batteries, and iguanodontians refined a method of grinding with tooth batteries, taken to its extreme in hadrosaurids. Some sauropods also evolved tooth batteries, best exemplified by the rebbachisaurid Nigersaurus.

There were three general dinosaur faunas in the Late Cretaceous. In the northern continents of North America and Asia, the major theropods were tyrannosaurids and various types of smaller maniraptoran theropods, with a predominantly ornithischian herbivore assemblage of hadrosaurids, ceratopsians, ankylosaurids, and pachycephalosaurians. In the southern continents that had made up the now-splitting Gondwana, abelisaurids were the common theropods, and titanosaurian sauropods the common herbivores. Finally, in Europe, dromaeosaurids, rhabdodontid iguanodontians, nodosaurid ankylosaurians, and titanosaurian sauropods were prevalent. Flowering plants were greatly radiating, with the first grasses appearing by the end of the Cretaceous.[42] Grinding hadrosaurids and shearing ceratopsians became extremely diverse across North America and Asia. Theropods were also radiating as herbivores or omnivores, with therizinosaurians and ornithomimosaurians becoming common.

The Cretaceous–Tertiary extinction event, which occurred approximately 65 million years ago at the end of the Cretaceous period, caused the extinction of all dinosaurs except for the birds. Some other diapsid groups, such as crocodylians, lizards, snakes, sphenodontians, and choristoderans, also survived the event.



*********HERE IS A PIC OF A DINO**********

http://updatedchobotnews.files.wordpress.com/2009/10/dino.jpg?w=450&h=262
http://updatedchobotnews.files.wordpress.com/2009/10/dino.jpg?w=450&h=262
http://updatedchobotnews.files.wordpress.com/2009/10/dino.jpg?w=450&h=262
http://updatedchobotnews.files.wordpress.com/2009/10/dino.jpg?w=450&h=262

Hi Hiki! my research is about the "Yamaceratops"! enjoy!
Yamaceratops is a genus of dinosaur from the Late Cretaceous. It was a primitive ceratopsian which lived in the Gobi Desert of Mongolia. Initially, the rocks it was found in were thought to be from the Early Cretaceous, but the age was reevaluted in 2009!The genus name refers to Yama, a Tibetan Buddhist deity the species name to the Eastern Gobi.Heres my pic....and heres another pic of a dino

Practically every child in the world, at some point, has been enthused with dinosaurs. Actually, probably most adults are intrigued by the dinosaur facts that have shown up over the years, also. Dinosaurs were a great part of our world history, and even though we may never fully understand them, or why they are now extinct, the fact remains that walking with dinosaurs must have been an amazing feat, and we all, in some way, would like to know more about the mystery that is dinosaurs.

Dinosaur facts have sprung up giving us some clue as to the life that these amazing creatures led and the tremendous size of some of them. Dinosaur pictures, although clearly recreated, have given us some insight to their size and shape, but it still seems that we know so little about what they were really like. Of course, we know a few facts about them from the many movies, television specials, and news broadcasts covering the latest dig for dinosaurs, but how much do we really know? We know that the most common Jurassic dinosaurs were the Camarasaurus. And we know that walking with dinosaurs is something that, if we are perfectly honest with ourselves, we have all dreamed about at some point. heres pic idk how to gwet it on here heres link https://i.servimg.com/u/f86/14/46/25/46/untitl11.jpg p.s. im robots01

heyy hiki here's my entry its about stegosaurus ^^


here's my dino pic! i drew it in real and scaned it im not a good drawer it looks like a kids drawing..

Here's privacyman's entry (He didn't copy and paste):

Practically every child in the world, at some point, has been enthused with dinosaurs. Actually, probably most adults are intrigued by the dinosaur facts that have shown up over the years, also. Dinosaurs were a great part of our world history, and even though we may never fully understand them, or why they are now extinct, the fact remains that walking with dinosaurs must have been an amazing feat, and we all, in some way, would like to know more about the mystery that is dinosaurs.

Dinosaur facts have sprung up giving us some clue as to the life that these amazing creatures led and the tremendous size of some of them. Dinosaur pictures, although clearly recreated, have given us some insight to their size and shape, but it still seems that we know so little about what they were really like. Of course, we know a few facts about them from the many movies, television specials, and news broadcasts covering the latest dig for dinosaurs, but how much do we really know? We know that the most common Jurassic dinosaurs were the Camarasaurus. And we know that walking with dinosaurs is something that, if we are perfectly honest with ourselves, we have all dreamed about at some point.

Children, of course, think that a dinosaur is the most awesome creature in the world. Dinosaurs for kids are plentiful. Stuffed animals, movies, action figures, all represent to children to amazing creatures that dinosaurs were. As we get older, we don’t lose the awe that dinosaurs inspire in us. As new dinosaur facts are presented we are all glued to the television or newspaper just trying to comprehend the magnitude of the era in which dinosaurs ruled the world. And it seems that the more we know, the more we want to know. We will forever be enthralled in the process of learning about dinosaurs.
The sad thing is, we may never fully know what walking with dinosaurs would be like. We can watch the movies and learning specials, but to have actually walked in their world is a feeling that seems out of reach. However, the more we learn about these amazing creatures, the more we can strive to place ourselves in their world. One day, it may be possible to get a feel of what living and walking with dinosaurs really was. Until then, we can still dream.

by privacyman

1. Some dinosaurs were as small as a hen, but the typical dinosaur weighed about as much as a hippopotamus or an elephant.
2. Dinosaur eggs are smaller than those of modern birds (relative to the weight of the mother). In fact, the largest known dinosaur eggs are much smaller than those of the extinct elephant bird of Madagascar.
3. Instead of chewing their food, some sauropods ground their food between stones in a portion of the digestive tract, much like the gizzard of a modern bird.
4. The earliest dinosaurs resembled two-legged, short-headed crocodiles, but later dinosaurs were oddly reminiscent of giant mammals and birds.
5. Some dinosaurs spent time in the water, but no dinosaur could swim very well.
6. Dinosaur bones have been found on all of the continents, but the fossil record is most complete in North America and Asia.
7. Dinosaurs had tiny (or completely absent) outside fingers and toes.
8. It's easy to tell a dinosaur skeleton from that of a modern reptile because dinosaur skeletons have a strong joint between the backbone and hips.
9. Small, two-legged dinosaurs could turn rapidly by swinging their tail abruptly in a direction opposite to where they wished to turn.