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A: Click here.
A: A fossilized dinosaur heart was recenty found. For more information on it, click here.
A: This is a hot question - there's evidence both ways. For information on this topic, click here.
A: Stegosaurus had tiny claws on its feet. Stegosaurus, like other Stegosaurians, may have been a herding animal, but this is far from certain. Stegosaurus was a plant-eater, and a group of them would not be called a pack (that term is reserved fro meat-eaters); it would be called a herd. For more information on Stegosaurus, click here.
A: T. rex weighed from 5 to 7 tons. For more information on T. rex, click here.
A: The last of the dinosaurs went extinct 65 million years ago.
A: For information on early fossil finds, click here.
A: The rhinosaurus is a plant-eater. For a printout on the rhino, click here.
A: For information on woollyy mammoths, click here. For a woolly mammoth printout, click here
A: Megalosaurus, Iguanodon, and Hylaeosaurus. For information on early fossil finds, click here.
A: Archaeopteryx had claws on its wings and on its feet. It also has a beak and teeth to help defend itself. It lived (150 million years ago, during the middle Jurassic period) near water in what is now Europe. The first Archaeopteryx fossil was found in Solnhofen, Germany, which was a relatively still lagoon. For more information on Archaeopteryx, click here.
A: The blue whale is bigger than any dinosaur. Athough some dinosaurs were longer, none were more massive.
A: Yes, dinosaurs were reptiles, and no one knows what color any of them were.
A: New York has no official state dinosaur. For a list of official state dinosaurs, click here.
A: No dinosaur is known to have spit poison, although in the movie "Jurassic Park," they had the dinosaur Dilophosaurus spitting poison.
A: Footprints can tell you a lot about the animal that made them. They can tell you:
A: For information onthis Thescelosaurus heart, click here.
A: It varied quite a bit from place to place (inner continent vs. shore and polar vs. equatorial) and from time to time (Triassic, Jurassic, or Cretaceous). The Triassic was generally warmer and dryer that the Jurassic or Cretaceous periods. The Earth began to cool during the mid Mesozoic For more information on the Mesozoic Era, click here.
A: The speeds of the dinosaurs varied a tremendous amount. The fastest (the ornithomimids) were probably about as a fast as a modern-day ostrich, running about 43 mph (70 kph), much faster than person. For more information on dinosaur locomotion, click here.
A: Yes, presumably, birds had already branched off and occupied different niches from the terrestrial dinosaurs. Their differences allowed many of these new species to survive the K-T extinction.
A: There were many different types of Ichthyosaurs. Some looked a bit like enormous modern-day dolphins, others looked like bloated versions of it. For information on Ichthyosaurs, click here.
A: For information on the Mesozoic Era, including climate, life forms, and the position of the continents, click here.
A: For information on Pterodactyls, click here.
A: The first Stegosaurus fossil was
found in 1876 by M. P. Felch.
Paleontologist Othniel C. Marsh named
Stegosaurus in 1877. For info on Stegosaurus, click here.
A: Neither Albertosaurus eggs nor nests have been found, so no one knows if it was a good parent. For information on Albertosaurus, click here.
A: For information on Triceratops, click here.
A: For a page on T. rex vx. Giganotosaurus, click here.
A: There were many different species of saber-toothed cats. Smilodon was among the largest of these early cats; it weighed about 440 pounds (200 kg). For more info on Smilodon, click here. For a printout on info on Smilodon, click here.
A: They lived from about 230 million years ago until 65 million years ago, a span of about 165 million years.
A: For info on Herrerasaurus, click here. For information on dragaonflies, click here.
A: John A. Ruben, a vertebrate paleobiologist from Oregon State University, used an 80-watt ultraviolet (UV) lamp to help reveal outlines of Scipionyx's fossilized internal organs. Ruben found that the position of Scipionyx's colon (intestines) and liver were similar to that of modern crocodilians (which are cold-blooded), and unlike that of birds (which are warm-blooded). The position of the liver also gives information about the lungs, since a muscle that runs by the liver helps the lungs to expand and contract in crocodilians. Scipionyx probably had reptilian-style lungs (and not highly efficient bird lungs).
Although Ruben's work is not absolutely conclusive, it looks like the small theropod Scipionyx may be cold-blooded. For more information on Ruben's work, see the January 22; 283: 514-516 (1999) issue of the magazine Science.
A: Click here.
A: For the classification of Ichthyosaurus, click here and scroll down to the section on classification.
Chelonians are classified as follows:
A: No one knows, since no T. rex eggs have been found. For information on T. rex, click here.
A: I answered that this morning. Please scroll down and read it.
A: Apatosaurus had a whip-like tail that it may have used for defense. It also had clawed feet.
A: The Triassic period was named in 1834 by the German geologist Friedrich August Von Alberti (1795-1878) (it was originally named the "Trias"). It got its name because this period of geologic time is represented by a three-part division of rock types in Germany. These three distinctive rock layers are (from the bottom or earliest) the Bunter (which is brown sandstone and red beds), the Muschelkalk, and the Keuper.
For more information on the Triassic period, click here. FOr a list of Triassic dinosaurs, click here.
A: Rutiodon was a phytosaur, not a dinosaur. It was an aquatic reptile that looked a bit like a crocodile. For more information on Rutiodon, click here.
A: Microvenator, named by John H. Ostrom, means "small hunter." Microvenator lived in the early Cretaceous period, about 119 million to 113 million years ago. This was a time when the Earth was warmer than it is now and the sea levels were much higher (since there was no polar ice). For information on Microvenator, click here.
A: The various Stegasaurs lived from the middle Jurassic period through the late Cretaceous period. Stegosaurus, in particular, lived during the late Jurassic Period, about 156-140 million years ago. For more information on Stegosaurus, click here.
A: Dimetrodon's name means "two measures tooth" because it had two types of teeth - sharp
canines and shearing teeth.. For more information on Dimetrodon, click here.
A: Coelurosaurus, Diplotomodon, Dryptosaurus, Hadrosaurus foulkii, Nodosaurus, Ornithotarsus were all found in New Jersey. Hadrosaurus foulkii is the most famous dinosaur from New Jersey, and it had hundreds of teeth. For a list of dinosaur finds by state, click here.
For a list of all the known dinosaur genera, click here.
A: They are all periods of the Mesozoic Era. For more information, click here.
A: No. For information on Apatosaurus, click here
A: Those two events happened about 65 million years apart; the last of the dinosaurs went extinct 65 million years ago and most mammoths died out anout 11,000 years ago. The K-T extinction 65 million years ago did open up many niches that mammal could inhabit, so it probably helped the development of mammals.
A: Brontosaurus means "thunder lizard." Apatosaurus is the new name fro Brontosaurus. For information on Apatosaurus, click here
A: No one knows. For inoformation on Stegosaurus, click here
A: For Jurassic period plants, click here.
A: For information on Apatosaurus, click here.
A: There is a drawing and a description in the Zoom Dinosaurs Dictionary (click here), and a large drawing in the printouts.
A: For a page on Dimetrodon, click here.
A: Fossils of Lystrosaurus have been found in South Africa, India, Europe, and Asia. For more information on Lystrosaurus, click here.
A: It varied quite a bit. Some had armor, others had horns, spikes, plates, whip-like tails, claws, tail maces, etc. For a page on dinosaur defences, click here. For a printout on dinosaur defences, click here.
A: Its hard to know exactly, but some candidates (large meat-eaters) would be Megalosaurus, Allosaurus, Piveteausaurus, Poekilopleuron, Dilophosaurus, Monolophosaurus , Szechuangosaurus, Yangchuanosaurus, Torvosaurus, Ceratosaurus, and Eustreptospondylus.
A: Dinosaurs lived during the Mesozoic Era, about 230 - 65 million years ago and lived on every continent on Earth. For a list of dinosaurs by continent, click here.
A: Click here.
A: Procompsognathus was a meat-eating dinosaur that lived during the late Triassic period. For more information on Procompsognathus, click here.
A: Adult ostriches acn be up to 9 feet (2.7 m) tall. For more information on ostriches, click here.
A: Probably. A Thescelosaurus was foundn with its fossilized 4-chambered heart, indicating that it was probably warm-blooded and active, since its heart was advanced and powerful. For information on Thescelosaurus, click here.
A: For a list of all the known dinosaur genera, click here.
A: We have a short page on the Permian at: /subjects/dinosaurs/dinotemplates/Permianprintouts.shtml
A: For a list of the known dinosaur genera, click here.
A: It varied for the different time periods and the different geographic locations of the dinosaurs. For very general information on the climate during the three periods of the Mesozoic Era, click here.
A: For the locations where dinosaurs were found, click here.
A: Tyrannosaurus rex means "tyrant lizard king."
A: Click here.
A: Maiasaura was pretty much a defenseless dinosaur. It was like a huge cow. It could probably kick its attackers with its hoof-like feet or nip with its beak, but neither of these would be very effective. Running away would be its best alternative. For a page on Maiasaura with pictures, click here.
A: For a page on Velociraptor, click here.
A: Yes, some dinosaur fossils have been found in Antarctica (which wasn't quite so southerly and cold during the time of the dinosaurs). For a page on Antarctic dinosaurs, click here.
A: Click here.
A: Triceratops was an herbivore, a plant eater (a primary consumer). It
probably ate cycads, palms, and other low-lying plants with its tough beak.
Triceratops could chew well with its cheek teeth (like other Ceratopsians,
but unlike most other dinosaurs). For more information on Triceratops, click here.
A: No one knows for sure. For a discussion of the debate, click here.
A: When the dinosaurs appeared (during the early Mesozoic Era, in the Triassic Triassic period about 230 million years ago), the continents were jammed together into a supercontinent called Pangaea. Pangaea started to break apart during the Jurassic period (roughly 150 million years ago), forming the continents Gondwanaland and Laurasia.
A: The Mesozoic Era.
A: Earlier ceratopsians.
A: For information on Dunkleosteus, click here.
A: Thomas Holtz's classification (cited in The Complete Dinosaur) divides Ceratosauria (early theropods whose ilium is fused with the other hip bones, whose neck vertebrae have two pairs of pleurocoels, etc.) into Coelophysoidea (including Dilophosaurus, Coelophysis, Liliensternus, Syntarsus, etc.) and Neoceratosauria (lncluding Ceratosaurus, Elaphrosaurus, Abelisauridae, etc.). There's a picture of the fused ilium of Syntarsus on page 274 of the book. Coelophysoidea were predators with an unusual kink or notch in the upper snout. They lived from the late Triassic until the early Jurassic period.
A: For info on T. rex, click here.
A: The Pterosaurs were flying reptiles that lived during the time of the dinosaur. They were very closely related to the dinosaurs, but are not technically dinosaurs. For more information on Pterosaurs, click here.
A: No, no one knows what their internal organs looked like or where they were positioned. For information on Diplodocus, click here.
A: We have a discussion of this in our section on T. rex's diet. To go there, click here.
A: Lots of animals were alive during the time of the dinosaurs, including fish (like sharks), insects (like dragonflies), worms, early mammals, and many other organisms. Dinosaurs are defined as reptiles that had a particular leg structure (columnar vs. sprawling legs) and other well-defined characteristics.
A: Richard P. Hilton found partial fossils (mostly limbs) of a plant-eating dinosaur in the Budden Canyon Formation of northern California. This dinosaur dates from the early Cretaceous Period (about 120 million years ago). It was a small ornithopod dinosaur with similarities to the hypsilophodontids, like Parksosaurus and Hypsilophodon. (Reference: R.P. Hilton, F.L. Decourten, M.A. Murphy, P.U. Rodda, and P.G. Embree, Journal of Vertebrate Paleontology, 1997, 17(3): 557-560 ).
A: Usually sedimentary rock.
A: Yes, dinosaurs have been found with arthritis and gout.
A: Neither Diplodocus eggs nor nests have been found yet (but other sauropod eggs have been found), so no one knows.
A: Ornithopods were beaked, bipedal, herbivorous (plant-eating) dinosaurs that lived from the late Triassic to the late Cretaceous Period. Drinker, Iguanodon, Hypsilophodon, and Othnielia were ornithopods. They belong to the group of bird-hipped dinosaurs (ornithischians). Ornithopod means "bird-footed".
Theropods were meat-eating dinosaurs that belong to the group of lizard-hipped dinosaurs (saurischians). They
were fast-moving, bipedal
carnivores (meat-eaters) with
grasping hands and clawed
digits. Theropods lived from the
mid-Triassic period until the end
of the Cretaceous period.
Theropod means "beast-footed".
A: Gondwanaland, also known as Gondwana, was the southern supercontinent formed after Pangaea broke up during the Jurassic period, roughly 130 million years ago. It included what are now the continents South America, Africa, India, Australia, and Antarctica. It broke up into smaller continents during the late Cretaceous period (roughly 65 million years ago).
For a list of dinosaurs (and some other creatures) that lived during the late Jurassic, the early Cretaceous, and the middle Cretaceous periods on what is now South America, Africa, India, Australia, and Antarctica, click on the underlined period names just mentioned, and go the sections on the appropriate continents (note: there are a lot of dinosaurs from that time).
A: For a list of all the known dinosaur genera, click here. Many are links to more information on that dinosaur, many with pictures..
A: Birds, like all other animals, can successfully breed only with other animals in their own species.
A: Yes, at Dinosaur State Park in
Rocky Hill, Connecticut. For more information, see our page on Dinosaur Museums and Parks.
A: None (that area was under the sea for most of the Mesozoic Era, since the sea levels were higher than they are now as there was no polar ice for most of that time), but giant, ancient shark fossil teeth have been found in Georgia. For a list of dinosaur finds by state, click here.
A: For info on Alamosaurus and Ammosaurus, click here.
A: Mary Anning may have found the first Ichthyosaurus iaround 1811.
A: For a list of all the known dinosaur genera, click here. The dinosaurs whose description are in green letter were plant-eater.
A: Triceratops was an evolutionary dead-end. It went ecxtinct during the huge K-T extinction and left no descendants.
A: The blue whale.
A: The Mesozoic Era began after the Permian extinction (the largest mass extinction in the hidtory of the Earth, 248 million years ago) and ended with the K-T Extinction, 65 million years ago.
A: See the page on dinosaur extremes.
Q: How many types of dino's are
from Joel w, Huntsville, Alabama, U.S.A; April 17, 2000
A: For a list of all the known dinosaur genera, click here.
A: There were many more plant-eaters. For more information on dinosaurs' diets, click here.
A: Stegosaurus was a plant-eater (a primary consumer in the food web). For more information on Stegosaurus, click here.
A: No, only a few bones (a radius, manual ungual, tibia and distal caudal vertebrae) were ever found. They were collected by the crew of the H.M.S. Fly in 1844 during a trip along Queensland. The location where the fossils were found was never recorded, and no other have been found yet. For more information on Agrosaurus, click here.
A: Tanystropheus ate fish, For more information on Tanystropheus, a Triassic reptile, click here.
A: Giganotasaurus was a giant meat-eating dinosaur found in South America. It was slightly taller than T. rex. For more information on Giganotosaurus, click here
A: Yes, scroll down and read it.
A: For information on the K-T extinction which killed the dinosaurs, click here.
A: No, but giant, ancient shark fossil teeth have been found in Georgia. For a list of dinosaur finds by state, click here.
A: Pachycephalosaurus was a plant-eating dinosaur. Its most obvious feature was its dome head. It had a skull up to 10 inches thick (25 cm). For more information on Pachycephalosaurus, click here.
A: For information on Dinichthys/Dunkleosteus, click here.
A: Iguanodon lived during the early Cretaceous period, about 135-125 million years ago. At this time, the Earth was warmer than it is now, and the supercontinent Pangaea was breaking up. There was also a lot of volcanic activity at that time. Iguanodon was a 30 feet long (9.3 m) plant eater. It must have needed a lot of plants to eat each day, and must have lived in relatively lush areas. For more information on Iguanodon, click here.
A: Bambiraptor was a juvenile coelurosaur. For more information on Bambiraptor, click here. Other dinos named early this year include: Byronosaurus and Tendaguria.
A: Sue the T. rex was found near Faith, South Dakota, USA. I don't think it's open to the public, but Sue will be on view at the Field museum in Chicago, IL, in May, 2000.
A: Ornithomimus was a meat-eater. For more information on Ornithomimus, click here
A: Triceratops fossils For more information on Triceratops, click here.
A: Tyrannosaurus rex was up to 40 feet (12.4 m) long, about 15 to 20 feet (4.6 to 6 m) tall. It was roughly 5 to 7 tons in weight. Fossils have been found in western North America and Mongolia. For more information on T. rex, click here.
A: For information on Velociraptor, click here.
A: For information on the Cretaceous Period, click here.
A: For a chart of geologic time, click here.
A: No one knows; there is no fossil evidence that they did. For information on Brachiosaurus, click here.
A: Dinosaur fossils have been found on all seven continents.
A: No - see the following chart.
A: Oviraptor was a late dinosaur; it lived during the late Cretaceous period, about 88-70 million years ago. The dinosaur went extinct about 5 million years later. For more information on Oviraptor, click here.
A: The incubation period of bird eggs varies from species to species. Chicken eggs take about 20-22 days to hatch. Swan eggs take about a month. Pigeons hatch in about 18 days. Budgies (parakeets) hatch in 27-28 days. There's also a little variability due to the temperature.
A: Plesiosaurus was a genus of flippered marine reptiles from the early Jurassic period. It was roughly 7.6 feet (2.3 m) long with 4 wide, paddle-shaped flippers, and a tapered body. For more information on Plesiosaurus, click here.
A: It was a second brain that was thought to be at the base of the tail in Stegosaurids and some sauropods. It is now thought that it was not a brain at all, but just a lump of fatty tissue.
A: Triceratops was named by Othniel Marsh. For more information on Triceratops, click here.
A: Pterosauria means "winged lizard." For information on Pterosaurs, click here.
A: Extinction is when an entire species of animals dies out. For information on extinction, click here.
A: Dinosaurs lived on all the continents, including Antarctica (which wasn't quite so southerly during the Mesozoic Era).
A: A Hadrosaur (duck-billed dinosaur) was found in Minnesota. For other state's dinosaurs, click here.
A: Mastodon means "breast tooth."
A: Dinosaurs got diseases like arthritis and gout, which damage the joints. This may have caused some dinosaurs to limp.
A: Stegosaurus fossils have been found in the western USA. Stegosaurus lived during the late Jurassic period, about 156 to 145 million years ago. For more information on Stegosaurus, click here.
A: About 200 or so. For more information on Allosaurus, click here.
A: Triceratops evolved from earlier ceratopsians, dinosaurs similar to like Protoceratops and Montanoceratops. Nothing evolved from Triceratops; it and its close relatives went extinct during the K-T extinction. For more information on Triceratops, click here.
A: For a lot of information on Ankylosaurus, click here. There are also printouts and quizzes on Ankylosaurus (the links are at the bottom of the Ankylosaurus page).
A: Brachiosaurus fossils have been found in Tanzania, Africa and western North America. For more information on Brachiosaurus, click here.
A: The most obvious is the increase in size of some sauropods, like Brachiosaurus. Also, Archaeopteryx, the first, primitive,
dinosaur-like bird appeared about 150 million years ago, toward the end of the Jurassic. For more information on the Jurassic period, click here.
A: No, not at all. THey were preceded by early simple animals (like bacteria) many invertebrates (like sponges, corals, worms, insects, crustaceans, etc), fish, amphibians, and other reptiles.
The dinosaurs went extinct long before this (65 million years ago), perhaps as the result of an asteroid colliding with the Earth, which altered the climate drastically.
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