Tyrannosaurus Rex Fossils

The specimens are not fossilized, but were reported in a Nature news article as having “the consistency of wet blotting paper” (once exposed, the bones had to be left to dry before they could be dug up). Researchers hope to discover preserved mitochondrial DNA to compare and contrast with samples from similarly unfossilized specimens of Homo neanderthalensis and Homo sapiens (www.en.wikipedia.org). Some are hoping to find a relationship between

The Tyrannosaurus rex has a bone-crushing force skull, massive and long legs, and a brain that has a strong sense of smell. These characteristics were beneficial to the T-rex. First, the jaw of the T-rex was able to crush their prey's bones and drag the meat further which is also known as puncture and pull strategy. Next, the T-rex legs were massive and long especially in the juvenile stage because it had the strength of an adult legs which they were able to fast walk. Lastly, the T-rex had a strong sense of smell and binocular vision which can easily capture their prey. On the other hand, their arms were shortened relative to the size of T-rex body. There was no evidence that the T-rex used their arms for predation or scavenging.

Layers of soil are laid down on dead animals or plants embalming them. The minerals replace the organic matter creating the fossil.

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 reading states that the researchers deliberately broke open the Tyrannosaurus rex's leg bone and found remains of blood vessels, red blod cells, and collagen matrix and provides three reasons of support. However, the professor states that it's skeptical that T.rex has all of structures and refutes each of the authors' reasons.

The fossils in the lower silty layers were most likely formed below water by normal geological processes. The sea level rose covering the organisms and the layers of silt settled above them. In the upper sandy layers the fossils could have been formed above water by a sudden catastrophic event as a result of ongoing erosive processes. The conditions in which the fossils formed were likely a result of wave action which eroded the coast line until it was unstable. When the sea level receded there was a landslide covering the

In fact, the La Brea Museum houses one of the largest collection of bird fossils (The Natural History Foundation , n.d.). Looking at the actual fossils themselves we can see that they are brown in color instead of the usual white associated with bones. This is due to the asphalt staining the bones but it does not alter its composition which is why they are referred to as unaltered remains. These body fossils are formed through rapid burial in the asphalt which allows for the hard remains of the animals and plants to be preserved (Wicander, 2012). When looking at Pit 91, most of the fossils found are skulls and jawbones which suggests that the animal most likely struggled to break free and then fell on its side, leaving its limbs exposed. Predators and scavengers when then come to feast on the exposed limbs thus getting stuck themselves (Perkins, 2004). An interesting observation of the discovered fossils is that 90% of the mammals are carnivores which based on today’s ecosystems, herbivores are more abundant. A majority of these carnivores were pack hunters and therefore if they were chasing a single prey into the tar pits it could account for the large proportion of carnivores to herbivores. This large entrapment was not an everyday occurrence and based on the number of fossils that have been discovered, it was calculated that a

Another important piece of evidence was fossil distribution. Fossils of many different species were found on multiple continents yet these species fossils showed no evidence that they could swim across the extensive oceans that separate the continents in present day. One of these species was Mesosaurus, a crocodile-like reptile that lived in freshwater lakes and ponds. Mesosaurus was found only in South Africa and South America and, being a coastal animal, there was no way it could swim across the large ocean that now separates the two continents. Another species was Lystrosaurus, which was only found in Antarctica, India, and South Africa. Being a land dominant species, Lystrosaurus would not be capable of crossing the Atlantic Ocean. Glossopteris,

The author and his colleagues chose to focus on 375 million year old rocks in their search for fossils because amphibians that look dissimilar to fish were discovered in 365 million year old rocks, while fish without amphibian characteristics were discovered in 385 million year old rocks. Thus, it is possible that the evolutionary intermediary, or the “missing link” between fish and amphibians, would be discovered in 375 million year old rocks, between the two time periods. The rocks examined were sedimentary in composition, as the gradual and relatively gentle formation of sedimentary rock under conditions of mild pressure and low heat are conducive to the fossilization of animal remains. Sedimentary rock is also often formed in rivers and seas, where animals are likely to live. This site provides a resource that describes means by which fossils are formed and how the fossil record may be interpreted, and shows some examples of fossils demonstrating evolution through geological periods: http://www.fossilmuseum.net/fossilrecord.htm. In 2004, Shubin and his colleagues were looking for fossils on Ellesmere Island, in northern Canada. This location was chosen because of its lack of human development, as well as of obstructing natural formations and life forms such as trees, which

The fossils themselves are unique and they appear to be unlike any modern-day organisms. These fossils are found to be very different in

Marty is a 34-year-old man who still lives with his mother, Theresa Piletti, in the Bronx. He is the eldest child and has yet to be married or start his own family like his 5 younger siblings have already done. Marty has become frustrated about his situation because not only does his mother nag him about it; the customers at the butcher shop where he works also question him. One day, Theresa managed to convince Marty to go to a dance at the Stardust Ballroom. During the party, he meets a teacher named Clara and the two hit it off right away. Unfortunately, Marty’s family does not support the relationship and he has to choose whether to listen to his family’s wishes and give up on Clara, or ignore them and give their relationship a chance. The

These techniques led to the discovery of the boundary between the two eras. A single thin layer of clay found within predominantly limestone rocks established this. By comparing the marine life found in, above, and below the clay, the marine life, like the dinosaurs, had been terribly affected by the extinction event. The percentage of life in the upper layers was dramatically lower than that in the lower. This was far more compelling than what was suggested by dinosaur’s fossils.

The social constructionism of the Amish community is one that passes quick judgment. The judgments might include the Amish having a simple life. The thought that the members are forced into the religion. That they lose out from choosing not to fully utilize electricity. That they must all dress the same. Regardless of how people view them, there needs to be further examination of their culture, before a socially constructed perspective of their community is made. This examination is important to sociology due to the ever-growing population of Amish people within North America. The mass major of Amish use to live in Europe today there are no Amish people left in the country. Although, in North America, there are over 250,000 Amish people, most of which live in either Pennsylvania or Ohio (Yonke, 2010, p. 1). Never the less, they are still true to their roots and still speak German,

First, Crichton noted that duckbilled dinosaurs were herbivores which are supported by a trace fossil found in the coal beds of the western North America that indicated footprints with plant fossils (Martin 2006). Furthermore, duckbilled dinosaurs lived in a vegetated environment that they had to consume enough food relative to their body size. Duckbilled dinosaurs had lengthened their skull and smoothed snout to obtain and process more food. The Dilophosaurus was described as two curved crests that extended from the eyes to the nose. The crest created a V shape on the head with red and black stripes on the crests (Crichton, 1990). Based on fossil evidence, the Dilophosaurus had two crests on the head, but there was no indication of the pigment of the crest. Next, the book stated that the T. rex does not bite the prey, instead, it twisted and tore the

Marijuana is the dried leaves, flowers, stems, and seeds from the hemp plant, Cannabis Sativa. Marijuana contains delta-9-tetrahydrocannabinol (THC) which is responsible for the stimulation of brain cells that release dopamine creating a feeling of happiness and excitement. Research and experiments have proven that marijuana can have superb results on health issues. Marijuana can be used to treat and prevent diseases such as glaucoma, seizures, decrease anxiety, minimize cancer pains, and many more. A drug that causes temporary relief from problems that has never been connected to overdoses is illegal in the United States because of two men, Harry Jacob Anslinger, and William Randolf Hearst. Harry Anslinger was a United States government official