Essay on The Debate Over Birds and Feathered Dinosaurs

Although the Ediacaran period was well before the first appearance of dinosaurs it shows that there were fossils many years ago. When dinosaurs first appeared things had changed there was still shallow water which meant that bones could be fossilized.

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

In a study published in Cretaceous Research and conducted in October 2012 by Anthony R. Fiorillo, Thomas L. Adams and Yoshitsugu Kobayashi, evidence of dinosaurs was based on the finding of an unnamed nonmarine sedimentary package of rocks. Found in the Wrangellia Terrane and considered to be Cretaceous age, the rocks are light colored with medium grey shales and indicate a bounty of horsetails, ferns and gymnosperm wood.

The elongated arm bones that support the wing evolved in the first coelurosaur, which probably looked like ornitholestes. As far as we know feathers are unique to birds, but this doesn’t mean that birds are not dinosaurs. Because birds belong to the group called dinosaurs, it follows that birds are feathered dinosaurs. The closest known evolutionary relatives of birds are some of the small carnivorous dinosaurs, such as velociraptor, ornitholestes, and deinonychus. The difference between a Tyrannosaurus Rex and Apatosaurus is that almost everything about Tyrannosaurus Rex indicates enormous power of one of the largest theropod dinosaurs that ever existed. They have a 4-foot-long jaw, 6-inch-long teeth and massive thighbones. It is the largest and most fearsome carnivore of all time. The fossil was originally arranged so that the dinosaur stood

Subclass – Archeorinthes –*Fossil birds (Jurassic birds of Mesozoic Age). *Flight feathers present. *Long tail without a pygostyle. *Carpals and metacarpals free. *Abdominal ribs present. *Hand reduced to three digits.

The skin showed evidence of stripes and perhaps soft tissue. Apparently scientists stated that it died on the banks of Hell's Creek, where its body was rapidly buried under accumulating sediment and should have been wiped out by the decay process. However, the mineralization had been so rapid that it is trapped and preserved as the waterlogged soil buried it in before the body could decay much, thus ensuring preservation. Although fossils containing organic compounds or mummified soft tissues have been discovered before, the presence of both is extremely rare (National Geographic News, 2017) (Charles, Q. 2009). The fossilised soft tissues resemble those seen in modern birds and crocodilians supporting the hypothesis that modern birds and crocodiles are descended from dinosaurs (Switek, B.

In the current times, feathers are only found in birds and provide them a unique nature. Feathers vary in size, color, shape, and arrangement on the body of the birds. They are used for various purposes such as flight, insulation, beauty, swimming and floating, support when the birds are not flying and constructing nests. It is essential to understand the origin of feathers. Evidence of the existence of feathers can be dated back to one hundred and sixty million years ago during the Last Jurassic period (Chen et al., 2015). Long before birds used feathers for flying and for insulation purposes, some scientists believe, they were used by Epidexipteryx, a small dinosaur, for display and seduction of dinosaurs of the opposite sex. They first appeared

In the past, millions of species were eradicated off the face of the Earth from various reasons including natural disasters, the inability to adapt to the environment, and even food scarcity. This essay will cover the origin, diversification, adaptive characteristics of duck-billed dinosaurs more commonly known as hadrosaurids which have been extinct from Earth millions of years ago. Hadrosaurs were one of the many dinosaur groups whose bones were left to study and learn about the past. These creatures were also mainly studied for their tough skin as a “hadrosaur versus another dinosaur, you’re 31 times more likely to preserve skin.”

Now, there are a lot of questions related to wether or not large theropods like Tyrannosaurus rex for example were totally covered in a dense coat of feathers or where totally scally creatures. Some say being so large it would have been a disadventage fot a "fluffy" T-rex, because it will have been suffering of overheating, but feathers are very different from the hair of mammals, the structure of feathers allow large birds like the ostrich to discipate the heat from the body if the external temperature is so hot (very similar to the mecanisms that modern afrinac elephants have with their large ears!). So large meat eating dinosaurs would have lived very well with a dense coat of feathers even if their environment was very hot (of course the case of a "fluffy" T-rex is still in debate, some think thet T-rex would have beel partially covered in proto-feathers and scales, but wheter of both scenarios, large theropods would have developes mecanisms for losing heat, see link below the

Evolutionists say dinosaurs lived million of years ago. Scientists have estimated that the last dinosaur died approximately 65 million years ago. Scientists still are not sure how they died, but they suspect that climatic weather, diseases, changing plant communities, and geologic events could have had something to do with their extinction. The oldest Jurassic dinosaur was a Basal Netheropod from Great Britain. Scientists have found fossilized eggs, bones, and feces. Dinosaurs have been unearthed by creationists on their ranches and land in the United States; men and women have found thousands of dinosaur skeletons and other artifacts that were left behind in the prehistoric ages. Scientists have found some fossils as small as rats, but

The natural world consists of many wonders. Some can be difficult to see or experience but however some wonders are a bit more obtainable, if you want to see a dinosaur all you need to do is look to the skies where they are flying around us, although this comment is very debatable as people have speculated that birds did not evolve form dinosaurs but from their own ancestors. Birds have the same structure as a dinosaur like for example the pterodactyl this is why people thought that birds evolved form dinosaurs but is that really the case?

Archaeologist and researchers have discovered a dinosaur fossil tail that has feathers on it preserved in amber. In her article Dinosaur tail preserved in amber — feathers and all, Meghan Rosen (2017) states, “The golden chunk of amber is 99 million years old. Inside sits something extraordinary. It’s a tiny dinosaur tail — with pristinely preserved feathers.” Since they found one dinosaur fossil with feathers on it there is bound to be more. Because we don’t know what dinosaurs actually looked like, this could tell us that they had feather on them. There has been feathers from this time period before but just didn’t contain dinosaurs fossils, but this one did contain feathers from a dinosaur (Meghan Rosen, 2017). The

The first dinosaur fossil was found by Reverend Plot, in 1676, at the time it was believed to belong to a “giant” but was probably from a dinosaur although a report of this find was finally published by R. Brookes almost 100 years later in 1763. Theories suggest that it was a Megalosaurus dinosaur. It was after this time that scientist more specifically, paleontologist became interested in these giants. Even with today's advances in technology, scientists are not sure about the lifespan of some dinosaurs, some scientists believe that they might have lived for 200 years, up to present time. Apart from that a lot of people think that dinosaurs only lived in some parts of the world, but that is wrong and fossils have been found that indicate, dinosaurs lived in Antarctica.

The reason birds lived when the dinosaurs died? Seeds, scientists say is written by Kate Allen. This article talk about how the birds ancestors survived on of the worst days on this planet which is when the asteroid collided with earth.

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.