Hello there!

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

Last edited by Nandoo1 on Sun Oct 25, 2009 7:56 am; edited 1 time in total

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

Last edited by muttly on Fri Oct 23, 2009 4:17 pm; edited 1 time in total (Reason for editing : ... stop flood control)

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[b] 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[/b]





















































by:sara1001 i hope u like it

Last edited by sara1001 on Sat Oct 24, 2009 5:43 pm; edited 13 times in total

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



Last edited by Guguzi on Tue Oct 27, 2009 4:01 pm; edited 4 times in total

[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

Last edited by Tenpeny on Fri Oct 23, 2009 3:38 pm; edited 3 times in total

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 http://i35.tinypic.com/ezius.jpg

~v_chobot

Good Luck For Everyone!

Last edited by Tenpeny on Fri Oct 23, 2009 4:26 pm; edited 1 time in total

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

Hello Dear Mates!

I will make post about the dinosaurus of name Centrosaurus!

Soo...Let's do it!

About the name:

The name Centrosaurus means "pointed lizard" (from Greek kentron), and refers to the series of small hornlets placed along the margin of the frill, not to the horn on its nose (which was unknown when the dinosaur was named). It is not to be confused with the stegosaur Kentrosaurus, whose name is derived from the same Greek word.

Small desciption:



Centrosaurus massive body was borne by stocky limbs, although at 18-20 ft,it was not a particularly large dinosaur. Like other centrosaurines, Centrosaurus had a single large horn over the nose. It may curve forwards or backwards in different species.

A pair of small horns is also found over the eyes; in Centrosaurus apertus these are directed upwards, whereas they are directed to the sides in Centrosaurus brinkmani. The frill of Centrosaurus was moderately long, with fairly large fenestrae and small hornlets along the outer edge.

Centrosaurus apertus is distinguished by having two large hornlets which hook forwards over the frill, while in Centrosaurus brinkmani these hornlets are small and covered with small, finger-like growths.


Centrosaurus's history:

The first Centrosaurus remains were discovered by paleontologist Lawrence Lambe in strata along the Red Deer River in Alberta, Canada. Later, vast bonebeds of Centrosaurus were found in Dinosaur Provincial Park, also in Alberta. Some of these beds extend for hundreds of meters and contain thousands of individuals of all ages and all levels of completion. Scientists have speculated that the high density and number of individuals would be explained if they had perished while trying to cross a flooded river.

Some pictures:









I drew these pictures!






I think chobots 2,000,000 years ago looked like this! And what do you think?



I think dinosaurs was verry interesting "animals"! Soo I'm very excited!I tipying on google,and i founded a cool site,where can u buy dinosaur modells and other cool things!If you have time then check it out! http://www.dinocasts.com/prod_catalog.asp

I hope you like my research! Good luck for everyone!

P.S.: In capital city of Slovakia,Bratislava here is a Dino park and there are lot of interesting living statues! Why are they living? Because they move,and other cool stuffs! Its really cool! I send a picture:





-Gypman142

Last edited by Gypman142 on Mon Oct 26, 2009 4:06 pm; edited 3 times in total

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 http://i87.servimg.com/u/f87/14/27/41/18/dino10.jpg

Last edited by username123456 on Sat Oct 24, 2009 1:17 pm; edited 1 time in total

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 :

http://i36.tinypic.com/f0vjf7.jpg

And my chobots name is Bube07 not Bube077 XD