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Zoom Dinosaurs
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By Date By Type of Dinosaur General Dino. Qns. Qns. About Other Animals Geological Era Qns.

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Questions from June 2000

Q: Does an emu have a gizzard?
from joan a, vancouver, BC, Canada; June 30, 2000

A: Yes. For more information on emus, click here.

from JENNIFER D., STATEN ISLAND, NY, USA; June 30, 2000

A: For a list of digs you can join, click here.

Q: Where can I find information about the Mongolian dinosaur, Nementosaurus?
from Geoffrey W., Brisbane, Queensland, Australia; June 29, 2000

A: For information on Nemegtosaurus, click here.

Q: What types of mammals (if any) co-existed in the Jurassic period?
from Julio A., Los Angeles, CA, USA; June 29, 2000

A: Yes, there were mammals during the Jurassic period (they had evolved earlier, during the Triassic period. Some Jurassic period mammals included Morganucodontids (like Morganucodon and Megazostrodon), Haramiyids (like Haramiya), Docodonts (like Docodon), multiberculates, symmetrodonts, pantotheres, and a recently-found, mouse-sized Middle Jurassic mammal (a tribosphenidan) from Madagascar.

Q: Was there any dinosurs in alaska??? if so which ones???
from Camilla B, Soldotna, AK, USA; June 29, 2000

A: Yes, Albertosaurus, Ankylosaur (an unknown genus), Edmontosaurus, Pachycephalosaurus, Pachyrhinosaurus, Saurornitholestes, Thescelosaurus, and Troödon. For more dinosaur finds, listed state, by state (and country by country), click here.

Q: Can you give me some information on Snakes
from lakshmi, Chennai, Tamilnadu, India; June 28, 2000

A: For information on snakes, click here.

Q: Did Carnotaurs really exist?
from Jason M., W Bloomfield, MI, ?; June 28, 2000

A: Yes. For information on Carnotaurus, click here.

Q: are nektonic animals cold-blooded?
from Mimi B, Dunedin, Fl, USA; June 28, 2000

A: No, not all are. Nektonic (nektos is Greek for "swimming") animals are those marine creatures that are able to swim against the current. Fish, whales (who are warm-blooded), and many other orgaisms are nektonic. n

Q: What is the kind of dinosaur that spits?
from Tyler A., Southlake, TX, USA; June 28, 2000

A: In the movie 'Jurassic Park,' they had Dilophosaurus spitting, but there is no fossil evidence that this actually happened Q: WHAT IS THE LONGEST NAME FOR A DINOSAUR
from IAN, CARDIFF, ?, U K; June 27, 2000

A: Micropachycephalosaurus.

Q: who was the biggest swimming dinosaur
from Ted J, st.louis, missouri, usa; June 27, 2000

A: There were no aquatic dinosaurs, but there were some huge, aquatic reptiles that lived during the time of the dinosuar, including plesiosaurs, mosasaurs, nothosaurs, etc. The largest-known plesiosaur is Liopleurodon.

Q: What dinosaur was found in a clay pit in Surrey?
from ?, ?, ?, ?; June 26, 2000

A: Baryonyx was found in a clay pit in Surrey, England by William Walker.

Q: How do dinosaurs reproduce? Can you please send me some information as soon as possible because i am doing a assignment for school that's almost due in!
from david.m, Auckland, ?, New Zealand; June 26, 2000

A: No one knows how dinosaurs reproduced. No on knows how they mated and/or courted.

Q: What was the first Dinosaur ever found?
from Shealan K., Needham, Massachusetts, U.S.A.; June 26, 2000

A: For information on the first dinosaur finds, click here.

Q: What are some intresting facts about Triceratops.
from bryson, cahrlotte, north carloina, U.S.A; June 26, 2000

A: Click here for information on Triceratops. For a Triceratops printout, click here.

Q: What dinosaur weighed as much as twelve elephants?
from andrew m, depue, illnois, united states; June 26, 2000

A: Many of the larger sauropods weighed that much. Adult elephants weigh about 6 tons (5,400 kg). Many dinosaurs weighed more than 72 tons, including Argentinosaurus, Seismosaurus, Ultrasauros, Brachiosaurus, etc.

Q: Does dinosour eats stones?
from san, kl, wp, malaysia; June 26, 2000

A: Some dinosaurs swallowed stones, which remained in their stomach, helping to grind up tough plant material. These stones are called gizzard stones (they are also called gastrliths). Many modern-day birds also swallow gizzard stones.

Q: How many dinosaurs are there
from Chris E., Front Royal, VA, USA; June 25, 2000

A: No one knows how many dinosuars there were. About a thousand different genera have been found so far (any many more species). Most existing fossils probably haven't been found, and most types of dinosaurs probably did not fossilze.

Q: Does a styracosaurus really have 6 shap spikes.
from Lindsay p, MARKHAM, ONTARIO, CANADA; June 25, 2000

A: Styracosaurus had many spikes and horns on its head. For a large picture, of Styracosaurus, click here.

Q: What was the first name of the new dinosaur found by the Chicago museum of natural history?
from Jamie C, Glen Burnie, Maryland, USA; June 24, 2000

A: The new dinosaurs at the Field Museum in Chicago, IL, USA is the T. rex called Sue. They didn't find it, they bought it.

Q: what is that nick name of the Thescelosaurus dinosaur thats fossilized heart was recently found
from kenny,p, naperville, illinios, us; June 24, 2000

A: This is the CyberSafari question we just put up, so I can't answer your question (but the answer is on Zoom Dinosaurs somewhere).

Q: What do you think of Phytodinosauria as a natural grouping of Sauropodomorpha and Predentata?
from Brad, Woodville, ON, Canada; June 23, 2000

A: Only a very small percentage of paleontologists use the grouping Phytodinosauria (Sauropodomorpha plus Ornithischia), grouping all the plant-eating dinosaurs together. Most paleontologists use hip structure to separate Ornithischians from Saurischians first (believing that this how evolutionary progressed). In this system, Sauropods are closer to (meat-eating) theropods than to ornithischians.

Q: How can the sense ablities of dinosaurs be determined? Ex: How do scientists know Quaesitosaurus had good hearing?
from Lou, New Prague, MN, ?; June 23, 2000

A: Quaesitosaurus had a large resonating chamber in its middle ear. Living animals with large eyes generally have good eyesight (and animals wih small eyes ofen have poor vision), so when an extinct animal had large eyes (judged by the bones in its skull), it probably had keen eyesight.

Q: where is the brontosaurus info!!!!!???????????
from michlle, washougal, washington, usa; June 23, 2000

A: Brontosaurus is now called Apatosaurus. Click here for information on Apatosaurus/Brontosaurus.

Q: How do you pronounce Quaesitosaurus?
from Lou, New Prague, MN, USA; June 23, 2000

A: Quaesitosaurus is pronounced kwee-SEE-toh-SAWR-us.

Q: Are any dinosaurs in Antarctica?
from Walter M., Burmingham, TN, USA; June 23, 2000

A: Yes; the continent of Antarctica wasn't nearly as cold during the Mesozoic Era (when the dinosaur lived) as it is now. This is because Antarctica was not at the South Pole then, and the Earth was warmer in general. For a list of known Antarctic dinosaurs, click here.

Q: what is the chicken mimic of MOngolia
from carmen p, Great Falls, Mt, USA; June 23, 2000

GallimimusA: Gallimimus (which means "rooster mimic") was found in Mongolia. For more information on Gallimimus, click here.

Q: What are brachiopods, trilobites, bryozoans, horn corals?
from debbie r, buffalo, ny, us; June 22, 2000

A: Brachiopods are a phylum of animals also known as lamp shells (bottom-dwelling marine invertebrates that have two protective shells and tentacles); they superficially look like mollusks.

For information on trilobites, click here.

Bryozoans (also called moss animals or sea mats) are a phylum of small invertebrate animals that live in salt water (or occasionally in fresh water). Bryozoans live in colonies of many polyps. They have ciliated tentacles and a hard, box-like, calcium carbonate skeleton. Bryozoans date from the Early Ordovician, roughly 400 million years ago.

Horn coral is a type of large, horn-shaped coral (order Rugosa) that lived as a solitary individual or as a colony. This invertebrate evolved during the Ordovician Period, roughly 500 million years ago. Horn corals are important index fossils. Their fossils are also sometimes used to determine the length of the day (and the year) in the distant past due to the manner in which they grew.

Q: Thank you very much for the information on Archaeopteryx. Your information and help has been much appreciated. Could you help me with one more question? If scientists once thought he was a dinosaur, what kind of dinosaur did he think it was? A theropod? Thank you once again.
from Walter M., Burmingham, TN, USA; June 22, 2000

A: Yes, but it's more complex than than. In cladistics, a type of classification of organisms in which evolutionary relationships determine the classification, birds are dinosaurs (if indeed they descended from dinosaurs). So Archaeopteryx (and all birds) belong to the clade of dinosaurs. Q: Is a Carnotaur an actual dinosaur or is it just a fictitious name used in Disney's DINOSAUR movie? If it is real, can you tell me something about it?
from Michael M, Hicksville, NY, USA; June 22, 2000

A: Carnotaurus was a real dinosaur. For information on Carnotaurus, click here.

Q: What is an Arkeyapterx?
from Walter M., Burmingham, TN, USA; June 22, 2000

A: Archaeopteryx is the oldest-known bird; it dates from about 150 million years ago during the Jurassic period. For more information on Archaeopteryx, click here.

Q: what is a teradactyl?
from ?, ?, ?, ?; June 22, 2000

A: Pterodactyls were a group of flying reptiles that lived during the time of the dinosaurs. They were closely related to the dinosaurs. For more information on Pterodactyls, click here.

Q: What are the many characteristics of as ornithopod?
from Chris P., Los Angeles, CA, USA; June 21, 2000

A: Ornithopods are a suborder of ornithischian dinosaurs that have no hole in the outer, lower jaw and a long pubis that extends farther forwards than than the ilium (Paul Sereno, 1986). Ornithopods were beaked, bipedal, herbivorous (plant-eating) dinosaurs that lived from the late Triassic to the late Cretaceous. Ornithopods are divided into the groups: Hadrosaurs, Hypsilophodontids, Iguanodontids, and Fabrosauria. Drinker, Iguanodon, Hypsilophodon, Muttaburrasaurus, Leaellynasaura, and Othnielia are examples of ornithopods.

Q: Is Brachiosaurus a sauropod?
from ?, ?, ?, ?; June 21, 2000

A: Yes. For more information on Brachiosaurus, click here.

Q: Can you PLEASE give us the group to which every dinosaur belongs? It would be a great help for us. We are doing an extensive project for the Internet. Please help. Thank you very much for not referring us to a graph.
from ????, ????, MN, U.S.; June 21, 2000

A: Click here for the major dinosaur families.

Q: When was the first dinosour skelliton found
from ?, ?, ?, ?; June 21, 2000

A: For information on the first dinosaur fossils found, click here.

Q: When did the huge shark known as "Megladon" roam the earth's ocean's? And what was the cause of extinction?
from mike f., minneapolis, minnesota, u.s.a.; June 21, 2000

A: Megalodon lived from roughly 25 to 1.6 million years ago, during the Miocene and Pliocene epochs. It is now extinct, but the exact time of its extinction is hotly debated. The cause of its extinction is unknown. For more information on Megalodon, click here.

Q: I have a book that divides the groups of dinosaurs into seven basic groups: prosauropods, sauropods, theropods,ankylosaurs, ornithopods, ceratopsions, and stegosaurs. Although these groups aren't parrallel in their type of classification, this is the easiest form I have found to teach. Do you have any other ideas?
from ?, ?, ?, ?; June 20, 2000

A: That sounds fine, except I would start one step up to show the relationships between the groups (e.g., suaropods being closer to theropods than ornithopods). You could first divide dinosaurs into the saurischians (lizard-hipped) and ornithischians (bird-hipped). Then you could divide these orders into suborders. Saurischians are divided into the theropods (meat-eaters) and sauropodamorpha (long-necked plant-eaters: sauropods and prosauropods). Ornithischians are divided into: Ornithopoda (Hadrosaurs, Hypsilophodontids, Iguanodontids, Fabrosauria), Marginocephalia (Ceratopsians, Pachycephalosauria), and Thyreophora (Stegosaurids, Ankylosaurids).

For a page on this classificaiton of the dinosaurs, click here.

Q: Is there any other easily distinguishable traits between a sauropod and a prosaurpod other than their time periods of existance?
from ?, ?, ?, ?; June 20, 2000

A: The prosauropods (which means "before sauropods") were similar to the sauropods and the groups overlapped in time (prosauropods lasted until the early Jurassic period), but differed in that prosauropods had a reduced fifth metatarsal (toe) as compared to sauropods and hooked thumb claws. The prosauropods may have been ancestral to sauropods, or they may have had a common ancestor.

Q: Who discovered Maiasaura? I've heard either John Horner or Laurie Trexler, but I'm not sure which. Could you tell me which one?
from ?, ?, ?, ?; June 20, 2000

A: Maiasaura was named by Jack R. Horner and Robert Makela in 1979. Marion Brandvold and her son David Trexler found a huge bonebed of Maisaura, nests, and babies in Montana (dubbed Egg Mountain), which contained had thousands of specimens. Laurie Trexler found the holotype of Maiasaura peeblesorum (the type species). For more information on Maiasaura, click here.

Q: where is the best dinosaur musuem that i can take my 11 year old grandson to? he loves dinosaurs so i want to take him where he can see them. he would love seeing the real thing not just 3-d imax and kids play dinosaurs but, the real thing. please help me. i looked up dinosaur musuems and there are so many i do not know. the musuem in bozeman, mt (musuem of the rockies) caught my eye but i still don't know. thanks for your help
from teresa p, harrison, tn, usa; June 20, 2000

A: For a page on dinosaur museums (mostly those in the USA, Canada, and Australia), click here. A lot are really good, and they each have different types of exhibits. For more information on each of the museums, click on their name to go to their web page.

Q: Was the heterodontosaurus a carnivore or a herbivore?
from Shanna B., Odenton, MD, USA; June 20, 2000

A: Heterodontosaurus was a plant-eater (an herbivore).

Q: I am in the 4th grade and have to do a report on metriorhynchus. Do you know where else I could look on the computer? There isn't much information out there about this dinosaur. Thank you for your help.
from Jared N., Honolulu, HI, USA; June 20, 2000

A: (pronounced MET-ri-oh-RINK-us) Metriorhynchus (meaning "moderate snout") was a crocodilian, an aquatic reptile that was up to 40 feet (12 m) long. It had a long, toothed snout, a fish-like tail, and four short limbs with webbed feet. The rear legs were longer than the front legs. Metriorhynchus had no back armor. It lived during the mid to late Jurassic period. Fossils have been found in Europe (France and England) and South America (Chile). Classification: Order Crococylia, Suborder Mesosuchia, Genus Metriorhynchus, many species.

Q: how big are dinosaurs?
from dylan f, mt. airy, nc, usa; June 19, 2000

A: Dinosaurs varied quite a bit in size, ranging from the size of chicken to over 100 feet long.

Q: I don't have a question, I just want to anwser a question. Spencer, the question you asked about Brachiosaurus, I have the answer. Brachiosaurus didn't really have any enemies. But It did have one. Allosaurus. And Brachiosaurus lived in Tanzanea.
from Arlie, Pullman, Washington, USA; June 18, 2000

A: Allosaurus and Brachiosaurus were contemporaries, but Allosaurus was about half the size of Brachiosaurus, and probably could not kill a healthy adult.

from MAX, WAYNESVILLE, NC, USA; June 17, 2000

A: Click here for dinosaur skeletons.

Q: do some dinosaurs have two brains
from matt s, Phila, PA, USA; June 16, 2000

A: Probably not. It used be thought that some dinosaurs (like Stegosaurus and the large Sauropods) had a second brain at the base of their tail (in addition to the tiny one in their head). Scientists now think that the spinal structure at the tail base was not a brain, but simply an enlargement containing fatty tissue or nerves.

Q: Do you have a dinosaur in your index called Lufengosaurus.
from KH, Brisbane, Queensland, Australia; June 15, 2000

A: Yes, for information on Lufengosaurus, click here.

Q: when did the dinasours become extinct?
from ?, ?, ?, ?; June 14, 2000

A: The dinosaurs went extinct during the K-T mass extinction, about 65 million years ago.

Q: What did Pachycephalasaurus do most of the time?
from Kenny H., Oyster Bay, New York, United States; June 14, 2000

A: Pachycephalosaurus may have spent most of its time finding food. For information on Pachycephalosaurus, click here

Q: Do you have any info on Minmi's?
from Becky J., grover beach, CA, ?; June 14, 2000

A: Click here for a page on Minmi.

Q: Do you have a picture of what a megladon might have looked like?
from carrie r, northglenn, CO, USA; June 14, 2000

A: It isn't certain, but it may have looked like a great white shark. For information on Megalodon, click here.

Q: How many dinosaurs were on the planet
from Dalton B, Brentwood, California, USA; June 14, 2000

A: About a thousand genera are known, and many more species, but these probably represent just a small fraction of the dinosaur genera that lived (and either didn't fossilize or haven't been found yet).

from SHAWNA W., ORANGE, CALIFORNIA, USA; June 14, 2000

A: Sauropods probably had a life span on the order of a hundred years.

Q: What r the names of the family , genus , & species of the dinosaurs?
from Angelly p, T.O., CA, Usa; June 13, 2000

A: The dinosaurs are divided into two orders, Ornithischia and Saurischia. Within these orders are many families, lincluding stegosauria, ankylosauria, pachycephalosauria, tyrannosaurids, etc. Most paleontologists use cladistics (and not the linnean system). For a page explaining the classification of dinosaurs, click here. For a list of all the known dinosaur genera, click here.

from VINCE J, MIAMI, FLORIDA, USA; June 13, 2000

A: There are a few place where huge amounts of dinosaur (and other fossils) have been found, including the Ghost Ranch (New Mexico), Dinosaur Ridge (Morrison, CO), many sites in Montana, Wyoming, Utah (USA), Argentina, Lianong (China), the Gobi desert, and many others. Fossil-rich deposits are called Lagerstatten.

Q: How do scientists justify the use of color in reconstruction of dinosaurs?
from ?, ?, ?, ?; June 13, 2000

Dino checksA: Since the pigments in the dinosaurs' skin is not preserved in the fossilization process, we don't know what colors or patterns any of the dinosaurs were. Also, for most dinosaurs, skin imprints are not avaiable, so details in their outer structure (like dewlaps) are mostly unknown. Originally on Zoom Dinosaurs, we made all the dinosaurs plain, and included only the few anatomical details that were known (which means no pictures at all for most dinosaurs, except for a single tooth or a few bones). We recieved tons of (often extremely hostile) mail demanding "realistic" pictures, like our viewers had seen in dinosaur books written by reputable paleontologists and in museums. What we do (and most authors, illustrators and museums also do) is let people know that we have used educated guesses to fill in the details in our reconstructions for many anatomical structures that are as yet unknown (like skin color and pattern). Shows like the BBC's "Walking with Dinosaurs," are particularly guilty of adding far too many details (and behaviors) that are simply not known.

For example, for years we refused to put up a picture of Trachodon (since it is only known from some teeth). After receiving countless e-mails from frustrated kids who needed a picture of it for a school assignment, we added one, but noted that the drawing was based solely on characteristics of the teeth and its similarity to the teeth of other dinosaurs.

Q: Did frogs live at the same time as dinosaurs?
from Stephanie F, ?, ?, ?; June 13, 2000

A: Yes. The earliest frogs (like Triadobatrachus, from Madagascar) appeared during the early Triassic, and the first true frogs (like Vieraella, from South America) appeared during the early Jurassic period.

Q: What is the name of the extintion that happed after the mesozoic era.
from Spanish Cow, orange, CA, U.S.A.; June 13, 2000

A: The mass extinction at the end of the Mesozoic Era (also the end of the Cretaceous period) was called the K-T extinction.

Q: did humans exsit in the dinasour era?
from ?, ?, ?, ?; June 12, 2000

A: No, people evolved many millions of years after the dinosaurs died out.

Dinosaur timeline

Q: Who invented the term dinosaur? what does sauros mean? What does deinos mean?
from ?, ?, ?, ?; June 12, 2000

A: See the frequently asked question above.

Q: platypus genus and species
from ?, ?, ?, ?; June 12, 2000

A: Ornithorhynchus anatinus. For more information on the platypus, click here.

Q: did t-rex's evolve from raptors?
from lance b, marshall, michigan, usa; June 11, 2000

A: No, but they did have a common maniroptor theropod ancestor. For dinosaur cladogram (diagram of evolutionary relationships), click here.

Q: What were the major differences between the Brontosaurus (Apotosaurus), and the Brachiosaurus?
from Valerie W., Springfield, Ohio, USA; June 11, 2000

A: The most obvious differences between Apatosaurus and Brachiosaurus are the legs and the neck. In Apatosaurus, the front legs were shorter than the rear legs, and it stood with its neck and head close to the ground. Brachiosaurus' front legs were longer than its rear legs and it had a giraffe-like stance.

Q: how tall was a T.rex
from Rachael D., hillsborough, n.ireland, u.k.; June 11, 2000

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. For more information on T. rex, click here.

from ?, ?, ?, ?; June 11, 2000

A: Oddly enough, it's spelled Pterodactyl. For information on these flying reptiles, click here.

Q: Can you give me some info on the dinosaure apatosaurus?
from ?, ?, ?, ?; June 11, 2000

A: For Apatosaurus, click here.

Q: can you please find me some info on Pachycephalosaurus
from natalie a, york, ?, ?; June 11, 2000

A: For Pachycephalosaurus, click here.

Q: who discovered the stegosaurus?
from brandon l, sydney, n s w, australia; June 11, 2000

A: The first Stegosaurus fossil was found in 1876 by M. P. Felch. Paleontologist Othniel C. Marsh named Stegosaurus in 1877. For more information on Stegosaurus, 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. For more information on T. rex, click here.

Q: Does oil come from dinosaurs?
from Gina P., Seattle, WA, USA; June 10, 2000

A: Yes, but most oil comes from plant material, which is much more abundant.

from Casey F, NEW YORK, NYNY, USA; June 9, 2000

A: if you want to work with dinosaurs, some people work as professors (teaching paleontology and doing research), some people write about palentology, some people work as museum curators, fossil reconstructors, etc., and others are fossil hunters. Of course, some people do more than one of these.

Q: Has the brontosaurus' name been changed to brachiosaurus? If so, why was this change made? If not, what is the difference between the two dinosaurs?
from Valerie W., Springfield, Ohio, USA; June 9, 2000

A: Brontosaurus was changed to Apatosaurus. To read about the reason for this change, click here and scroll down o the section called "Fossils."

Q: Where can I find facts of a Maiasaura?
from Miriam Aranda, Fresno, California, ?; June 9, 2000

A: Click here for information on Maiasaura.

Q: what are the 10 basic dinosaur Genera????
from Maty P., ft. washington, MD, USA; June 8, 2000

A: There are close to a thousand known dinosaur genera. There are many fewer families. The major families include theropods, sauropods (or sauropodomorphs), ornithopods (hadrosaurs, hypsilophodonts, Iguanodonts, and fabrosaurs), marginocephalians (ceratopsians and pachycephalosaurians), thyreophorans (stegosaurids and ankylosaurids).

Q: Where did Troodon's fall in the food chain?
from Jess S., Ridley, PA, USA; June 8, 2000

A: Trodon was probably at the top of its local food chain. For information on Troodon, click here.

Q: what is a giant ground sloth
from johnmeisha c, washington, dc, ?; June 8, 2000

A: Megatherium was a giant ground sloth that lived during the last Ice Age. For information on megatherium, click here.


A: For an entry on him, click here.

Q: How did the dinosaur Janenschia defend itself?
from Kelly B, Ridley Park, Pennsylvania, United States of America; June 8, 2000

A: Its huge size was its best defense. Janenschia's hindlimbs had claws that were up to 4 3/4 feet (1.38 m) long. It also had a long tail that may have been used to lash at predators. Janenschia, like some other titanosaurids, may have been covered with armored scales, but there is no fossils evidence of this. For more information on Janenschia, click here.

Q: what do t rex bones look like ?
from ?, ?, ?, ?; June 8, 2000

A: Click here and here for more details.

Q: Do they have any idea on how baby dinosaurs were took care of? Did they take care of their babies like animals do today?
from thomas b, springfield, ohio, united states; June 7, 2000

A: Some dinosaurs, like Maiasaura, cared for their young, This is known because many fossilized Maiasaura adults, nests, eggs, hatchlings, and juveniles were found together in a large bonebed. For most dinosaurs, however, nothing is known about how or if they cared for their young.

Many animals today do not care for their young. Sharks, for example, lay their eggs (or give birth to live young, depending upon the species) and do not give it any care.

Q: How old was most dinosaurs when they had babies?
from ?, Hershey, Pennsylvania, United States Of America; June 8, 2000

A: It probably varied a lot depending on which type of dinosaur it was. The larger dinosaurs probably had a longer life span, and a longer time until reaching maturity. No one knows how old any dinosaur was at maturity.

Q: Look at various Internet sites and check if they have the name of the dinosaur you just mentioned earlier today.
from JIMMY L., ?, Georgia, United States; June 7, 2000

A: I looked again, but there are no references to it. I'm pretty sure it hasn't been published yet.

Q: What was the first kind of dinosaure?
from Maren S, Hong Kong, ?, China; June 7, 2000

A: The earliest known dinosaur so far are two prosauropods from Madagascar. The second-earliest dinosaur is a theropod from Argentina, called Eoraptor.

Q: How tall is Diplodocus?
from Dakota W, East Durham, NY, US; June 7, 2000

A: For information on Diplodocus, click here.

Q: What was the habitat and climate of the Albertosaurus? Did it have predators? What was it's life span? How did it care for its young? What was it's behavior and intelligence?
from sd, NORTHRIDGE, CA, USA; June 6, 2000

A: Albertosaurus probably had no large predators. I've never seen an estimate of its life span. There is no fossil evidence that indicates how ir even if it cared for its young. For informatino on Albertosaurus, click here. For information on the climate during the late Cretaceous period, click on that link on the Albertosaurus page.

Q: What does Apatosaurus mean?
from Karina S., Rochester, Ny, USA; June 6, 2000

A: Apatosaurus means "Deceptive Lizard." For more information on Apatosaurus, click here.

Q: What is the oldest known bird?
from Karina S., Rochester, Ny, USA; June 6, 2000

A: Archaeopteryx.

Q: What is the lightest dinosaur ever found?
from Rachel, Sydney, NSW, Australia; June 6, 2000

A: Juvenile Mussaurus (whose name means "mouse lizard") were only 9-16 inches long (18-37 cm) long. The weight of dinosaurs are only rough estimates, because all that is here today is fossilized bone (which are heavier that real bone). To determine the weight of a dinosaur, an accurate model must be made (which is often difficult or impossible) and then its density must be estimates (also a very iffy operation). This is why lengths are generally used for dinosaurs, and estimated weights are not well reported.

Q: I am doing a project on marine studies at school this term and I need information on Prehistoric marine creatures. Is there one or two sites that cover a few different marine creatures. Thankyou.
from Patrick O, Melbourne, Victoria, Australia; June 6, 2000

A: For a page on plesiosaurs, click here. For a page on ichthyosaurs, click here. For a page on mosasaurs, click here.

Q: What was the habitat of the Stegasaurus? What were the predators of the Stegasaurus? What climate did the Stegasaurus live in? What was the geography of where the Stegasaurus lived? How did the anatomy of the Stegasaurus affect its life? What special traits did the Stegasaurus have? How did the Stegasaurus care for its young? How intelligent was the Stegasaurus? What was the life span of the Stegasaurus?
from Brice H., Northridge, CA, USA; June 6, 2000

A: See the page on Stegosaurus. Its life span is unknown. For information on the climate it lived in, click on the link to the Jurassic period from the Stegosaurus page.

Q: How big were the dinosaurs poos?
from c.s., regina, sask, canada; June 6, 2000

A: It varied with the size of the dinosaur. By the way, fossilized feces are called coprolites. A recently-found T. rex coprolite. This coprolite is a whitish-green rock 17 inches (44 cm) long, 6 inches (15 cm) high and 5 inches (13 cm) wide. Coprolites up to 40 cm (16 inches) in diameter have been found, probably from a sauropod, considering the size.

Q: How do we know dinosaurs and humans were not alive at the same time?
from Dianne P., Oshkosh, WI, USA; June 6, 2000

A: Fossilized dinosaur bones are found in rock sediment that are dated from about 230 million to 65 million years ago. No dinosaur fossils have been found in later sediment. Human bones are not found in sediment from the time of the dinosaurs (but the bones of other early mammals are).

Q: How does a tyronnosaurus rex drink water.
from Travis S., portland, Orgeon, ?; June 6, 2000

A: No one knows.

Q: How many dinosaur spiecies are there?
from B.W., Minersville, P.A., ----------------------------------------; June 6, 2000

A: No one knows how many dinosaur species (or even how many genera) there were. A little under a thousand genera have been found so far, but that is probably only a small fraction of the ones that lived. For a list of all known dinosaur genera, click here.

Q: What was the Muttaburrasauruses defence technique
from Christian C, Perth, Western Australia, Australia; June 6, 2000

A: Muttaburrasaurus had a sharp beak and hoof like feet that would provide some protection. It may have had thumb spikes on each of its hands (hand bones haven't been found yet, but other iguanodontids did have these spikes).

Q: Is a dimetrodon a dinosaur
from Ryan O'Farrell, Westerly, RI, ?; June 6, 2000

DimetrodonA: No, Dimetrodon was pekycosaur, a different type of animal. For more information on Dimetrodon, click here.

Q: What age did the dinosuars flourish?
from Eric Shipley, Palmdale, California, USA; June 6, 2000

A: The dinosaurs lived during the Mesozoic Era. They peaked during the Cretaceous period (the latter third of the Mesozoic Era).

from Daniel D, Athens, OHIO, u.s.a; June 5, 2000

A: T. rex was named in 1905 by Henry Fairfield Osborn. For more information T. rex and its name, click here.

Q: Do you Know how dimetrodons were extinct.
from Edward A., Sasebo, Nagasaki-Ken, Japan; June 5, 2000

DimetrodonA: Dimetrodon went extinct in the huge Permian mass extinction (about 280 million year ago). For more information on Dimetrodon, click here.

Q: How do T.rex's reproduce. I can not find anything on it.
from Jason.B, Stanthorpe, Queensland, Australia; June 5, 2000

A: No one knows about dinosaur reproduction other than they hatched from eggs.

Q: What are some of the food that dinosaurs eat?
from nicole sexton, Adelaide SA, SA, Australia; June 5, 2000

A: Most were plant-eaters, some were meat-eaters and few were omnivores. For information on dinosaur diets, click here.

Q: What is the average wing span of a Pteranodon
from Michael B., Harlingen, Texas, USA; June 5, 2000

A: Pteranodon's wingspan averaged about 25 ft (7.8 m). For more information on Pteranodon, click here

Q: Was Spinosaurus a fast runner?
from Chris E., Front Royal, VA, USA; June 5, 2000

A: Spinosaurus had pretty long legs; it was probably a fast runner. For information on Spinosaurus, click here.

Q: What does the name Carcharodontosaurus mean?
from Ricky C, Washington, nj, usa; June 5, 2000

A: Carcharodontosaurus means "Shark-tooth Lizard." For information on Carcharodontosaurus, click here

Q: please me show T-rex bones?
from Vilaacak S., Syracuse, New York, U.S.A; June 5, 2000

A: Click here and here for more details.

Q: a six letter word for mammoth era
from judyt, lebanon, ky, united states; June 5, 2000

A: Ice Age.

Q: How do i find out how many dino. there were?
from Kevin F., wilmington, de, us; June 5, 2000

A: For a list of all known dinosaur genera, click here (there were many species in each genus). These are genera the ones that people have found so far - this is just a fraction of the genera that existed.

Q: Where there any areas of the world that dinosaurs did not live?
from Dave S., Brooklyn, NY, USA; June 4, 2000

A: Dinosaur fossils have been found on all seven continents, but there may have been some areas they didn't live in. For example, they may not have lived in extraordinarily dry deserts (like the Atacama desert) - but then again, they may have.

Q: what were the fruits in the jurassic period?
from nicole s, caracas, ?, venezuela; June 4, 2000

A: There were no fruits during the Jurassic period, since flowering plants hadn't evolved yet. For a page on Jurassic period plants, click here.

Q: How do you pronounce Bagaceratops, Carnotaurus, Protoceratops, Herrerasaurus
from Emily R, Milang, S.A., Australia; June 4, 2000

A: BAG-uh-CER-uh-TOPS, KAR-no-SAWR-us, PRO-toh-SER-ah-tops, and huh-RARE-ah-SAWR-us.

Q: Am doing some homework on dinosaurs and need to know where I can find a picture of a vulcanodon. Not been able to find a picture of this dinosaur anywhere.
from Sharon L, Catlettsburg, Ky, USA; June 4, 2000

VulcanodonA: Click here for an entry on Vulcanodon.

Q: Is it true that if the great extinction never happened,troodon would well..evolve into something humanoid(in other words,Dave Russel's theory)?
from Allan B., Calgary, Alberta, Canada; June 3, 2000

A: There's no way to know what would might happened in that scenario.

from cassandra g., SAGINAW, MICHIGAN, U.S.A.; June 3, 2000

A: For a page on dinosaur diets, click here.

Q: do you know of any university or college that has a field expedition in the southwest that allow individuals and famlies to camp out and help dig for fossils. This is a second attempt question.
from george c, shreveport, la, usa; June 3, 2000

A: I don't of any. If anyone out there knows of any, please write this page and I'll post the answer.

Q: how heavy is moschops
from chris e., front royal, v.a, USA; June 2, 2000

A: I've never seen a weight estimate for Moschops, but it was huge and stocky, about 16 feet (5 m) long. For a page on Moschops, click here.

Q: ¿ Why Dinosaurs had to adapt themselves to many changes? Please Explain to me.
from Estefanía E., Caracas, ?, Venezuela; June 2, 2000

A: Dinosaurs, like all other organisms, have to adapt to a constantly-changing environment or face extinction. They need to adapt to different food availability, ever-changing competitors and predators, extremes of heat and/or cold, too much or too little water, new disease organisms, etc.

Q: how are fossils dated?
from devin h., selah, wa, u.s.; June 2, 2000

A: Click here.

Q: what minerals made the sedimentary rock
from Patrece F., Youngstown, Ohio, U.S.; June 1, 2000

A: Click here for information on sedimentary rocks and their composition.

from viridiana r, El Paso, TX, EL PASO; June 1, 2000

A: Nodosaurus was an herbivore (a plant-eater) that ate low-lying plants. For more information on Nodosaurus, click here.

Q: How many bones did the T-REX have?
from Kassie L., Abbeville, United States, Louisiana; June 1, 2000

A: About 200 - no complete skeletons have been found, though. For more information on T. rex, click here.

Q: what large plated dinosaur is known for having a brain the size of a walnut?
from joshua l, st johnsbury, ?, ?; June 1, 2000

A: Stegosaurus.

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