Dinosaurs

A:

The smallest known dinosaur species include the Minmi, Pakicetus, Europasaurus, Phosphatherium, Microraptor, Raptorex, Microceratops, Lariosaurus and Nemicolopterus. These are all examples of the smallest dinos in a particular group, such as the smallest Raptor (Microraptor), which weighed around 2 pounds and was small enough to eat insects, and the smallest Tyrannosaur (Raptorex), which likely topped out at about 150 pounds.

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  • Were dinosaurs warm-blooded or cold-blooded?

    Q: Were dinosaurs warm-blooded or cold-blooded?

    A: Because dinosaurs are classified as reptiles, one might assume that they are cold blooded, but some scientists suggest that dinosaurs may have been somewhere between cold and warm blooded. Though most animals fall into either category, there have been some intermediary species known to science, with dinosaurs potentially being one of this number.
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  • What did Tyrannosaurus rex eat?

    Q: What did Tyrannosaurus rex eat?

    A: Tyrannosaurus rex primarily ate herbivore dinosaurs, including the Edmontosaurus and the Triceratops. Studies suggest that the Tyrannosaurus rex also practiced cannibalism. Paleontologists believe that if two Tyrannosaurus rex dinosaurs fought to the death, the winner would eat the loser, based on bite marks found on Tyrannosaurus bones.
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  • Could you outrun a Tyrannosaurus Rex?

    Q: Could you outrun a Tyrannosaurus Rex?

    A: A T-Rex could have run faster than an average human at top speed, but there is a chance that a human could outrun a T-Rex. We can never fully know how fast the Tyrannosaurus Rex ran, but scientists at the University of Manchester in England have come up with animated computer models based on fossils and estimated muscle mass that have helped them compute the probable top speeds of many dinosaurs. The Tyrannosaurus Rex is nowhere near the fastest, topping out at around 18 mph. The fastest dinosaur they computed was the Compsognathus, which ran about 40 mph.
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  • What is a list of omnivorous dinosaurs?

    Q: What is a list of omnivorous dinosaurs?

    A: Omnivorous dinosaurs include Anserimimus, Deinocheirus, Gallimimus and Othnielia. Fruitadens haagarorum was a small dinosaur known to be omnivorous by the presence of both sharp teeth resembling canines and leaf-shaped teeth suitable for grinding plants. As a heterdontosaurid, it exhibited a shift in diet from its earlier herbivorous relatives.
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  • Did deinonychus hunt in packs or alone?

    Q: Did deinonychus hunt in packs or alone?

    A: While some scientists argue that Deinonychus was a pack-hunting dinosaur, not all paleontologists agree with this assertion, though there is some isolated fossil evidence showing multiple Deinonychus specimens fossilized with a much larger prey dinosaur species. This evidence may establish that there was at least one instance of Deinonychus attacking the same prey, which was arguably too large to be taken down by a single Deinonychus, but that evidence is not sufficient for all experts in the field to agree that this dinosaur was definitely a pack hunter. There is additional evidence to support this idea, including multiple fossil sites suggesting that Deinonychus regularly fed on this larger dinosaur, the Tenontosaurus.
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  • What is the closest relative of the Tyrannosaurus rex?

    Q: What is the closest relative of the Tyrannosaurus rex?

    A: The chicken is the closest living relative of the Tyrannosaurus Rex, according to a team led by North Carolina State University paleontologist Mary Schweitzer. The scientists who came to this conclusion did so through a process of sequencing proteins from a fossilized Tyrannosaurus Rex leg bone, finding that molecules from the 68-million-year-old fossil showed great similarity to those found in chicken. This research constituted the first evidence of molecular similarity between dinosaurs and modern-day birds, a connection that had previously been conjectured based on physical similarities.
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  • Are there animals alive today that lived beside dinosaurs?

    Q: Are there animals alive today that lived beside dinosaurs?

    A: There are some animals on earth that can be traced back to the Mesozoic Era when dinosaurs walked the earth; these animals include monotremes such as the duckbill platypus, reptiles such as the crocodilians and sea creatures such as the sea urchin. For the most part, the animals that are alive today have made evolutionary changes from the forms they had when dinosaurs were alive. For example, though the event that caused dinosaurs to die out also killed many other reptile species, several surviving reptile species have direct ancestors from that era, including the crocodilians, which are smaller than their Mesozoic ancestors.
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  • How many types of dinosaurs were there?

    Q: How many types of dinosaurs were there?

    A: Dinosaur discoveries occur at a rapid pace, and it may be difficult to keep up with the exact number of dinosaurs there are at any given time, particularly because specimens used to determine this number may be incomplete or disputed; however, it can be said that there are about 800 confirmed and distinct species of dinosaur. New dinosaur discoveries are announced all the time at relatively high rates of as many as 30 per year, or about one every 10 days. Paleontologists have been known to get a bit overzealous with naming a specimen as a new and distinct species, and there have been hundreds of examples of dinosaurs that were once thought to be unique that have been proven otherwise.
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  • What was the longest dinosaur?

    Q: What was the longest dinosaur?

    A: Though there have been a few instances of scientists purporting to have found larger specimens, the longest known dinosaur that is widely accepted by paleontologists seems to be the Diplodocus, a type of sauropod dinosaur with a long neck and long tail that is said to have measured as much as 175 feet in length. There seems to be some controversy and debate around the question of which dinosaur is truly the longest, with scientists introducing competitors such as the Seismosaurus, which was once thought to be a distinct species but was eventually found to be a very large Diplodocus specimen. The Seismosaurus' discovery was announced in 1991, but its existence as a unique species was debunked just over a decade later, a fact that was announced at an academic event in 2004.
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  • What's the largest carnivore to ever live?

    Q: What's the largest carnivore to ever live?

    A: Based on fossil record, the dinosaur known as Spinosaurus and the prehistoric clade of marine mammals known as pliosaurs are the most apt top contenders for the title of "largest carnivore known to man." The Spinosaurus is the largest known carnivorous dinosaur, with fossil records indicating that this dinosaur could reach lengths of 50 feet and weigh more than 20 tons, but evidence of potential pliosaur size is inconclusive due to incomplete fossilized specimens. A partially fictionalized 1999 documentary from the BBC posited that there may have been pliosaurs that weighed more than 150 tons and were more than 82 feet long, but there is no fossil evidence to support this idea.
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  • Why was the brontosaurus's name changed to the apatosaurus?

    Q: Why was the brontosaurus's name changed to the apatosaurus?

    A: The gigantic, herbivorous Brontosaurus, which features an iconically long neck and tail, may be one of history's most famous dinosaurs, but its existence as a unique species was debunked in 1903, when someone realized that the skeleton that had been labeled as a Brontosaurus was actually an Apatosaurus. In this sense, the Brontosaurus was not renamed but rather determined to have never existed as a separate species. The same man, a Yale paleontologist named Othniel Charles (O.C.) Marsh, named both the Apatosaurus and the Brontosaurus, with the Apatosaurus discovery predating the Brontosaurus naming by two years.
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  • What do you do if you find a dinosaur bone?

    Q: What do you do if you find a dinosaur bone?

    A: Individuals who believe that they have found a fossilized dinosaur bone in an outdoor area should avoid touching it and instead take a photo and make note of its exact location using a map before making contact with a natural history museum such as the Smithsonian National Museum of Natural History in Washington, D.C. However, this procedure is not legally binding, particularly if the fossil is discovered on private land, though moral obligation may tell a different story. In the United States, individuals who find a fossil on their land are not required to report or hand it over to any authority.
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  • What was the lifespan of a stegosaurus?

    Q: What was the lifespan of a stegosaurus?

    A: Scientists approximate dinosaur lifespan by attempting to determine the metabolism of the animal, looking at its size and bone growth, and comparing with similar animals that are still around today. Based on these factors, a stegosaurus may have lived 75 to 100 years.
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  • What did dinosaurs eat?

    Q: What did dinosaurs eat?

    A: There is evidence that dinosaurs did not have a single, uniform and universal diet but rather a wide variety of dietary habits, with evidence supporting the idea that carnivorous, herbivorous and omnivorous species all existed. Different feeding styles were also likely, with some carnivorous species hunting prey such as mammals and small reptiles, while other carnivores may have been opportunistic carrion scavengers. There was likely even a good range of dietary variety amongst the herbivorous dinosaurs, which may have made up the majority of all dinosaur species.
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  • What was the largest carniverous dinosaur?

    Q: What was the largest carniverous dinosaur?

    A: The largest known carnivorous dinosaur is the Spinosaurus, which is so named thanks to the gigantic spikes that run down the dinosaur's back. These spikes form a "sail" that likely evolved to ward off enemies rather than predators. The Spinosaurus was likely too large to be preyed upon by other dinosaurs.
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  • Could a dinosaur be cloned from DNA preserved in amber?

    Q: Could a dinosaur be cloned from DNA preserved in amber?

    A: It is theoretically possible, though highly unlikely, that a dinosaur clone could be created. The idea that it's possible to clone a dinosaur using DNA preserved in amber was popularized by the movie Jurassic Park. This fictionalized version of the process made it seem like a relatively easy process, but in truth it's rather complex and improbable.
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  • How long ago did dinosaurs die out?

    Q: How long ago did dinosaurs die out?

    A: The purported mass dinosaur die off known as the K-Pg extinction event took place during the end of the Cretaceous Period (K) during the Mesozoic Era some 65 million years ago. This scientific theory is based on the study of the fossil record, which shows evidence for the existence of dinosaurs during the Mesozoic Era but not during the proceeding Cenozoic Era. There is a clear line of demarcation, an actual line found in sedimentary rock layers known as the K-Pg Boundary, with the majority of the fossilized remains found below this line belonging to the "Age of Dinosaurs" not appearing in the space above the line, which marks the beginning of the Paleogene Period (Pg), the Cenozoic Era and the "Age of Mammals."
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  • When did the velociraptor become extinct?

    Q: When did the velociraptor become extinct?

    A: The velociraptor became extinct at the end of the Cretaceous Period due to an asteroid strike at the Yucatan Peninsula that occurred roughly 65 million years ago. This extinction event, known as the K-T boundary, also killed all other known species of non-avian dinosaurs.
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  • What was the spinosaur's back fin used for?

    Q: What was the spinosaur's back fin used for?

    A: There seems to be a general lack of consensus among paleontologists as to what purpose the Spinosaurus' sail served; not only is there a lack of certainty as to why the sail existed, there also seems to be some question about whether the dinosaur actually had a sail at all. All questions about the Spinosaurus' anatomy must be answered using fossil evidence, which is limited to fossilized skeletal remains that show a crest of bones protruding upward from the dinosaur's spine. While some scientists feel that these bones provided the structure for a sail-like flap of skin, other argue that this spinal structure actually supported a large hump rather than a distinct sail.
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  • What was the largest dinosaur ever?

    Q: What was the largest dinosaur ever?

    A: Most paleontologists believe that the Argentinosaurus was the largest dinosaur to have ever lived. It may have been the largest land animal to have ever existed.
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  • What did Triceratops eat?

    Q: What did Triceratops eat?

    A: Triceratops were herbivorous and probably ate low-growing plants because of their short necks and low heads. They may have eaten bushes, small trees and grasses. They may have been able to eat taller plants by knocking them down with their horns and beaks.
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