When I was little, dinosaurs were stegosaurus, tyranosaurus etc. Now they're stegosaur or tyranosaur. Why?
542499
They still are.\n\nStegosaurus, tyranosaurus, etc. is still the correct name for a specific animal (like tyranosaurus rex), stegosaur or tyranosaur is the correct name for referring to any animals in that particular genus.
297873
The era you are asking about is Jurassic (it was between the Cretaceous and Triassic period). As for the fastest dinosaur in this era, if what Paleontologists have found is correct, I believe it was Compsognathus.
786583
In a very peculiar form of spelling I suppose it could. But it's more likely that dino stands for dinosaur.
445984
Dinosaurs were very abundant, I couldnt swear that they were the MOST abundant vertebrate.
893851
It is said that  when dinosaurs first appeared, the Earth was made up of one big continent. All the landmasses were joined together. This big continent is known as Pangaea.As time went by, Pangaea gradually broke apart into the landmasses we know today. First it separated into a northern and a southern continent. The southern continent, which included Australia, was known as Gondwana. During the Cretaceous Period, Gondwana gradually broke up into the present landmasses of Africa, South America, India, Antarctica, and Australia. Antarctica and Australia were the last continents to separate, starting about 100 million years ago. \n\nThe Antarctic was at the Earth's equator during the Cambrian period, roughly 500 million years ago. As the continents drifted atop the more liquid interior layers of the Earth, the Antarctic drifted south during the time of the dinosaurs (the Mesozoic Era) when it was attached to Australia. During that time, it had no glaciers, and housed many animals, including some dinosaurs. Over the millennia, Antarctica drifted farther south, separated completely from Australia, and is now located at the South Pole of the Earth. The fossils of first dinosaur were said to be found in Antartica.\n\nPaleontologists in Brazil reported of finding the oldest dinosaur so if that is the case, the first dinosaur could have first appeared in South America.\n\nBased on what has been described that the earth was just one continent, who will know which present continent it first appeared? It appeared and moved from here to there so fossils discovery in a certain place do not tell that such dinosaurs appeared in there as they were not confined in specific place.☺
692179
The movie "Dinosaur" is wrong (in a lot of ways other than the monkey thing... Actually, I think they were lemurs anyway).\n\nDinosaurs first evolved in the Triassic period. Before that, there were various types of reptiles and mammal-like reptiles that dominated the land. And some pretty big amphibians and insects, though the giant insects were extinct by the dinosaur age. Mammals evolved about the same time as dinosaurs did, but were mostly small rodent-like things for hundreds of millions of years.\n\nBirds evolved from coelurosaurs in the Jurassic period, and they lived along side dinosaurs for quite a while. Monkeys didn't evolve until the Cenozoic era, after the dinosaurs went extinct. That extinction left the earth open for mammals to diversify into the many forms we see today, monkeys and humans included.
20843
I read somewhere that when people found dinosuar bones, they believed them to be dragons. I guess as a way to explain them.  Not sure though
29709
Apatosaurus, often mistakenly refered to as Brontosaurus, is a genus of sauropod dinosaurs that lived about 140 million years ago, during the Jurassic period. They were some of the largest land animals that ever existed, about 4.5 metres (15 feet) tall at the hips, with a length of up to 25m (80 feet) and a mass up to 35 metric tonnes (40 tons). However, the Argentinosaurus was even larger.\n\nThe cervical vertebra and the bones in the legs were bigger and heavier than that of Diplodocus, but they both had the long neck and tail. The skull was first identified in 1975, a century after it got its name. The Apatosaurus had a claw on its hand, but only the thumb. Scientists have a theory about the tail being lifted perhaps a meter above the ground. It would prevent the dinosaur from stomping on it, and put the tail out of reach of predators.\n\n\nIn 1877, Othniel Charles Marsh published notes on his discovery of the Apatosaurus, and then in 1879 described another, more complete dinosaur — the Brontosaurus. In 1903, it was discovered that the apatosaur was in fact a juvenile brontosaur, and the name Apatosaurus, having been published first, was deemed to have priority as the official name; Brontosaurus was relegated to being a synonym. The name was not formally removed from the records of paleontology until 1974.
304118
Birds are the direct descendents of dinosaurs.  Many scientists will say they *are* dinosaurs.  As such, they are alive, so dinosaurs are alive.\n\nWhile it remains possible that some dinosaurs proper have survived, it is extremely unlikely at this point.  There is no physical evidence for it.\n\nYour second question is difficult to answer.  Are there prehistoric creatures that have survived?  Sure!  Pretty much every species on earth today (even humans!) is older than history, that makes it prehistoric!  Defining prehistoric any other way would essentially make prehistoric mean "not surviving today", so the answer would be no.\n\nWhat you mean, of course, is creatures to have survived from truly ancient times, such as from the Mesozoic (age of dinosaurs) or older, but again, it's difficult to answer.  There probably aren't any actual species that old, but it's difficult to tell if something in the fossil record is actually the same species as something alive today.  Consider, lions and tigers look and act very different alive and are certainly two different species, but it is very difficult to tell their skeletons apart.\n\nA lot of so-called "living fossils" really aren't.  For instance, we have no fossils of the Coelacanth.  It's closest relatives in the fossil record are in another family (as different as cats and dogs).  Cockroaches are often said to have been unchanged for millions of years, but it's not the case as the fossil record records them evolving continuously.  The first fossil cockroaches had three pairs of wings!\n\nBut some things have survived nearly unchanged for millions of years.  Six-gill and Port Jackson sharks are very much like they were in the age of dinosaurs.  The Tuatara is surprisingly like it's Mesozoic relatives.\n\nBut the king of living fossils is the Lingula brachiopod.  It looks like a clam and lives by filter feeding, but don't let it's calm appearance fool you.  These little guys are survivors.  They've been living in Earth's oceans almost unchanged for 550 million years!  That's almost as long as we have animal fossils at all!  Dinosaurs are hardly teenagers by comparison!\n\nAddenda:  The Komodo Dragon is NOT believed to be a dinosaur, at least not by scientists.  It is just a large monitor lizard.  Dinosaurs are not lizards, being classed among the Archosaurs with the crocodiles, pterosaurs and birds.
1098613
Try reading the article on bone from Wikipedia:\nhttp://en.wikipedia.org/wiki/Bone\n\nAnother interesting article is the Scientific American, July 2005, article on "How Dinosaurs Grew So Large--and So Small"\nhttp://www.sciamdigital.com/index.cfm?fa=Products.ViewIssuePreview&ARTICLEID_CHAR=6745BB5C-2B35-221B-6C30EAA4A975E3E3\n(See your school library for a copy)
595540
The popei plant came around right as the dinosaurs were going extinct... most dinosaurs has really small nasal cavities...\nmakes you think....
319148
The biggest dinosaur currently known is generally conceded to be Argentinosaurus, a huge sauropod (brontosaur-type) from the late Cretaceous of South America.  Extrapolation from the size of the fossilized bones found indicates that Argentinosaurus was up to 120 feet long and weighed in the neighbourhood of 100 tons.  The maximum weight estimate for a huge dinosaur like Tyrannosaurus was 8 tons, so Argentinosaurus was massive even for a dinosaur.\n\nAs to how some animals survived, while others did not is one of the big, big mysteries of the KT extinction event.  Why did pterosaurs all go extinct, but birds survive?  Why did ammonites and belemnites all go extinct, but sharks and nautilus survive?  Why did giant marine reptiles like mosasaurs and icthyosaurs go extinct, while crocodiles and snakes survived?  Some of those are hard to explain if an asteroid impact was the sole reason for the extinctions.  The general consensus seems to be that there were a large number of factors such as continental shifts creating faunal interchange between long isolated populations, which could spread disease among dinosaurs.  The continental shifts would also have altered ocean currents, changing environments and climate, and altering existing eco-systems (especially some of the rich shallow seas that existed at the time).  Adaptive radiation of flowering plants (Angiosperms) in the late Cretaceous may have caused stress on those animals that were dependent on the competing Gymnosperm plants.  Co-evolution of many insects in response to the radiation of Angiosperms may have somehow favoured the survival of the birds over the pterosaurs.  \n\nThen when the asteroid impact occurred, it was the straw that broke the camel's back for many of these species that were under intense pressure, but other species were able to survive.
302627
Synapsids include mammals-so I'm not sure what your question means.  Evolutionarily they seem to have evolved (from earlier reptiles) around the same time as the dinosaurs.  The link I provide is an excellent resource.
384281
this is hard but here are my reasons and you can decide. the chicken has evolved from the tyranosaurus rex or TRex. but, remember that dinosaurs laid eggs. so it's your choice
24541
We can't really prove it. All their insides were decayed, so the only evidence of them being reptiles is their bone structure. But for all we know, they could have been fuzzy, warm blooded, dinosaurs. There is no way to determine either way scientifically, because we can't see a live one.
138564
These fossils are from when the flood took place. The water and the sudden pressure perfectly conserved these pieces of bone. We believe in dinosaurs just not evolution. Watch the videw "Answers from Genesis" this guy is excellent teacher
369136
I assume you mean the dinosaur:  pterodactyl