what was the lifespawn of a dinosaur?
832549
Oh you mean the hundreds of different varieties.......yeah if I had three days to get that info for you, I still wouldn't.\n\nspecify next time
517841
The egg.  Dinosaurs were laying eggs far before chickens had evolved, so the egg had to've come first.  :)
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.
488312
The Ichthyosaurus was a predator. It ate fish, shellfish and squid.
45341
The biggest dinosaur is probably ultrasauros. We only have a few bones of this late Jurassic (140 million years ago) plant-eater from Colorado, but the bones show an animal who was six-stories high and may have weighed more than 50 tons. A four-legged plant-eating dinosaur found recently in Argentina, argentinasaurus, may have been even heavier than ultrasauros. If it was a brachiosaur like ultrauros then it probably was the biggest, but if it was a titanosaur, another kind of big plant-eater common in South America, it wouldn't have been so bulky.
1079530
i wonder what a dinosaur dick looks like?
896736
Liopleurodon\n\nLiopleurodon is a relatively common and well preserved fossil from several marine deposits throughout Europe. It was a type of pliosaur, or short-necked plesiosaur.\n\nPliosaurs are a group of plesiosaurs. Plesiosaurs are one of a type of reptiles that returned to the sea. They appeared in Early Jurassic times and rapidly split into two major groups: long-necked forms like Cryptoclidus, and short-necked forms, or pliosaurs like Liopleurodon.\n\nIt had four large paddle-shaped limbs, which made it a powerful swimmer. At almost 25 m long Liopleurodon was the biggest carnivore that ever existed. It had an enormous 3 metre long mouth which contained teeth twice as long as those of Tyrannosaurus. These were arranged in a distinctive rosette at the end of its snout. The remains of Liopleurodon attacks are also preserved in the fossil record. Half-eaten ichthyosaurs and teeth marks in plesiosaur flippers are clear evidence of their voracious appetites.
334602
havent u seen the jurassic-park movies ?? its the large dinosaur that comes in these movies all the time.its a huge sized flesh eating dinosaur.also called T-REX (as its full name is tyranosauras rex).its till date,the largest carnivorous dinosaur that ever inhabited earth.
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.
821521
I like to see a dinosaur\n\nCoach
957170
Only if it is a penisaurus.  A penis the size of a dinosaur.  Never seen one?  Look me up.  They don't call me stallion because I can run fast!
67728
An Evolutionary History based on Comparative Anatomy and fossil Sequences
33036
The egg. Dinosaurs were laying eggs way before there were chickens!
458593
Elasmosaurus, as a top predator probably didn't have too many enemies.\n\nWhile some of the larger mosasaurs such as Tylosaurus may have been able to give Elasmosaurus a fight, it's unlikely that they would have.  Elasmosaurus' body was quite well armoured, almost like a sea turtle's, and it would have been quite tough to injure.\n\nA really large predator like Kronosaurus could have done quite a number on Elasmosaurus, but there would probably be enough other prey about that it would prefer those to the overly crunchy plesiosaur.
788399
Where does it mention dinosaurs in the Bible?
584214
One of the earliest known dinosaurs, Coelophysis (see-law-FYS-iss) meaning "hollow form" in reference to its hollow bones (Greek koilos = hollow + physis = form) is a small, carnivorous biped from North America. It first appeared in the Late Triassic period, around 210 million years ago.\n\nDescription\nCoelophysis bauri is the earliest well known dinosaur. C. bauri was a lightly built dinosaur, between two to three meters in length, and less than a meter tall at the hips. The name Coelophysis means "hollow form" or "hollow process, so named because of its hollow limb bones.\n\nDespite being an early dinosaur, the evolution of the theropod body form had already advanced greatly from creatures like Herrerasaurus and Eoraptor. Coelophysis had an elongated snout with large fenestrae which helped to reduce skull weight, while narrow struts of bones preserved the structural integrity of the skull. The neck had a pronounced sigmoid curve.\n\nThe torso of Coelophysis conforms to the basic theropod body plan, but the pectoral girdle displays some interesting characteristics. C. bauri had a furcula (wishbone), the earliest known example in a dinosaur. Coelophysis also preserves the ancestral condition of possessing four digits on the hand (manus). It had only three functional digits, the fourth embedded in the flesh of the hand.\n\nThe pelvis and hindlimbs of C. bauri are also slight variations on the theropod body plan. It has the open acetabulum and straight ankle hinge that define the Dinosauria. The hindlimb ended in a three-toed foot (pes), with a raised hallux.\n\nThe tail of Coelophysis had an unusual structure within its prezygapophysis that formed a semi-rigid lattice, apparently to stop the tail from moving up and down (Gay, 2001). This may have let tail act as a rudder or counterbalance when the animal was maneuvering.\n\n\nBehavior\nEvidence for behavior in the fossil record is always spotty, and this also holds true for Coelophysis. Despite the huge number of specimens available from Ghost Ranch, only some basic deductions about its behavior can be gleaned.\n\nCoelophysis was probably opportunistic, catching live prey and scavenging. The teeth were typical of predatory dinosaurs, blade-like and recurved with fine serrations on both anterior and posterior edges. They were rooted in the jaws in sockets, and were being continually replaced throughout the animal's life.\n\nSince our knowledge of Coelophysis comes basically from the specimens excavated from Ghost Ranch, there is a tendency to see this massive congregation of animals as evidence for huge packs of Coelophysis roaming the land (a la Walking with Dinosaurs). There is no evidence for this. What the deposit does tell us is that large numbers of Coelophysis, along with other Triassic animals, were buried together. Some of the evidence from the taphonomy of the site indicates that these animals may have been gathered together to feed or drink from a depleted water hole, or to feed on a big spawning run of fish, and then were buried in a catastrophic flash flood. This reconstructed incident inspired the scenario of the first episode of Walking with Dinosaurs.\n\nSome people, both lay and professional, have suggested that C. bauri was a cannibal. While this possibility cannot be ruled out, the evidence from the commonly-cited examples does not appear to hold up to scrutiny (Gay, 2002). There may be other evidence coming to light that may show stomach contents from some of these specimens, which might bring greater resolution to the subject (Reinhart et al., 2005).\n\nTwo forms of Coelophysis have been found, a more graceful form and a slightly more robust form. Opinion among paleontologists is now that these were female and male variants (see: sexual dimorphism) (Colbert, 1989, 1990; Paul, 1988; Gay, 2005).\n\n[\nClassification\nCoelophysis is a distinct taxonomic unit (genus), composed of a single species, C. bauri. Two additional species we
521023
That would be an exoskeleton. Basically a shell on an organism (ants, beetles, most insects), instead of having bone structures such as humans and other mammals