2 Two Favorite Dinosaurs

A dinosaur has an antorbital fenestra with an open hole hip socket. The definition differs from the term used informally because it helped understand how the dinosaur moved and how they were categorized as species. There are four general characteristics that dinosaurs have as a result of their synapomorphies which are permeated acetabulum, ball-shaped head on proximal femur, the Cnemial crest on the proximial tibia, and an ascending process on astragalus. These four dinosaur synapomorphies are related to vertical limb support.

Gould espouses more of the ideology of Williams and Colomb regarding why the theories of dinosaurs being incapable of having children and overdosing on psychoactive plants are entirely without merit. Williams and Colomb say, “we engage one another cooperatively in arguments, we aim not to coerce or seduce others into mindless agreement, but to enlist them into helping us to find the best, most reasonable solution to a shared problem”(67). Williams

Sedimentary rocks interpret dinosaur habitats through encased environmental structures of the past. Through sedimentary rocks, paleoecologists’ can examine the arranged formation of sedimentary structures to specify what type of environment the dinosaurs’ lived in. An example of a specific sedimentary rock structure can be seen through formed weathering and ripple marks by how wind and sand formed distinct patterns in the past layered sediment. These arrangements provide interpretations on the structure of the sediment and the habitat of encased fossils, through modern day comparisons

The Tritheledont, found in rocks that, according to the law of superposition were 190 million years old, had teeth and other skin features such as scales like mammals and reptiles, respectively.

The main dinosaurs that died off were Sauropod dinosaurs, long necked, four legged dinosaurs, and stegosauridae, class holding Stegosaurus. Other species that died include ammonites, similar to the living animals called nautilus, many marine reptiles, and bivalves, relatable to modern mollusca. Not much is known about this extinction. It is mainly linked to climate change. So far, no connection to volcanic activity or an asteroid has been made. This extinction gave way to the Cretaceous Period.

Marsh, named and described a new species of sauropod named Apatosaurus with a description based upon little else but a few vertebrae and part of a pelvis in 1877. Later Marsh hastily named another sauropod Brontosaurus also that was based upon incomplete material, even after more of the skeleton was recovered, he ended up presenting a full reconstruction of this sauropod. Later however in 1903, Elmer Riggs, which was another paleontologist showed that the bones of Brontosaurus and Apatosaurus belonged to the same dinosaur. After this the name Brontosaurus was stricken from records until recently when it has been proposed to bring Brontosaurs back (Tschopp). In fact there was another error that some paleontologists suspected, however haven’t been able to prove wrong. It seems as if Marsh also made the mistake of using the wrong head on a dinosaur. He ended up giving his skeleton of Brontosaurs the skull of another sauropod named Camarasaurus (Othniel C.

2) While they're in the control room on their tour, John Arnold, the chief engineer of the park, mentions how they monitor the dinosaurs through motion sensors and video surveillance through out the park. While they are here, Arnold shows Malcolm a graph of the procompsognathid height distribution in the park because Malcolm brings up the topic of

Tyrannosaurs Rex, better known as the T-Rex, which means Tyrant lizard king lived during the late Cretaceous period, about 85 million to 65 million years ago. They were 40 feet long and 20 feet tall and weighed up to 7.5 tons. They were strictly carnivores and used their very sharp teeth to eat other dinosaurs. Fossils were discovered in Western North America and the skull of a T- Rex alone measured up to 1.5m(5ft) long. The also have the record of having the largest tooth of any carnivorous dinosaur found to this day, which is around 30cm (12in) long. When the T-Rex hits around the age of 14 its body size would increase rapidly, putting on around 600kg (1300Ib) a year over the next 4 years.

According to Holmes, the Time of the Giants begins by looking at the geological and its ecological conditions which creates opportunities for the expansion of dinosaurs in the Middle and Late Jurrasic Epochs. It describes widespread changes to ocean and land enviroments, including worldwide climate changes that served as catalysts for the spread of the jurassic “giants”: the dinosaurs. The book explores the broad ranges of the largest and biggest of all land animalsand tells the discoveries and changing scientific images of the early so-called “giants” over the past one hundred fifty years. By the end of the Jurassic Period, several evolutionary trends were in motion that would be played out by the giant creatures, dinosaurs, in the next

The extinct genus specie dimetrodon live in the early Permian period it was around two hundred and ninety five to two hundred seventy two years ago. The family member of dimetrodon is the sphenacodniate. The dimetrodon walk on four legs also it had a tail, curved skull with very large teeth of many different sizes set along the jaw. Most of the dimetrodon fossils have been found in the southwestern part of the United States. Recently dimetrodon fossils have been found in Germany.

Staurikosaurus is a dinosaur within the therapod group. Its name is Greek for “Southern Cross Lizard,” named after a small cross constellation visible in the southern hemisphere. It was named by Edwin H. Colbert and its species name is “pricei,” named after Colbert’s colleague, Llewellyn Ivor Price. Price discovered the dinosaur in 1936 in Southern Brazil, but it was described by Colbert in 1970. Staurikosaurus lived in the late Triassic period, roughly 225 million years ago, making it one of the earlier dinosaurs. It was relatively small, standing only 2.25 meters tall, but stretching to a long 7.5 meters from head to tail. It also only weighed about 66 pounds. While the fossil record of the Staurikosaurus is relatively incomplete, scientists

Every so often a discovery is made that attempts to shake up pre-conceived notions of how the dinosaurs actually lived or how they came to be. On June 22, 2000, in Oregon, scientists announced the discovery of the oldest known animal to have feathers. Though no records indicate how the age of the animal was determined, the

There were over 1,000 different species of dinosaurs (“Dinosaurs”) that lived and evolved for almost 185 million years (“Dinosaur Facts”). Dinosaurs were some of the largest and most mysterious creatures to walk the Earth. Dinosaurs have helped scientists to understand the Earth and it 's past by studying different types, how they lived, their characteristics and what caused their mass extinction.

Jurassic Park by Michael Crichton demonstrated many dinosaur characteristics and behaviors. The dinosaurs were fictionally characterized to appeal to the readers. By examining the dinosaur’s appearance and behaviors of dinosaurs such as the duckbilled dinosaur, velociraptor, hypsilophodontids, dilophosaurs, Triceratops, apatosaurs, Tyrannosaurus rex, stegosaurs, and maiasaurs distinguished whether the evidence existed in the field of paleontology. The behaviors and characteristics of the dinosaur are divided into three factors as behaviors that were supported, not supported, and no evidence to support or refute the behavior.

The biggest mystery surrounding the dinosaur is how did they die? For over 130 million years dinosaurs ruled the earth. Then 65 million years ago, at the end of the Cretaceous period, they died out.