Cannibalism and Feeding Habits of Dinosaurs
Cannibalism is a long-standing taboo in our society; the thought of humans preying on other humans for a food source disgusts and astounds us. Though the practice is not common amongst modern day humans there is some evidence to suggest that ancient humans resorted to such measures, and a recent discovery in Madagascar attests to the possibility that some carnivorous dinosaurs fed on their own species (Perkins, 2003).
Majungatholus atopus roamed the plains of northwestern Madagascar about 70 million years ago during the Late Cretaceous (Perkins, 2003; Rogers et al, 2003). The discovery of 21 tooth-marked elements originating from two Majungatholus atopus individuals suggests evidence that the dinosaur supplemented its diet by feeding on its own dead or hunting them (Rogers et al, 2003). It cannot be confirmed whether they were purely scavengers, hunters, or both. Scientists are certain that the marks are not the doing of any other predator because the teeth marks are not consistent with any other known species that lived in the area. Only one other theropod that inhabited the area during the time Majungatholus atopus did, Masiakasaurus knopfleri, had teeth and bite marks too small to have caused these markings. Two large crocodile species also shared the same ecosystem but their teeth were “too blunt and too irregularly spaced to have produced the narrow grooves found on the Majungatholus bones”(Perkins, 2003). The tooth marks on at least nine Majungatholus elements attest to intertooth spacing in the perpetrators jaw and denticle drag patterns consistent enough to make a compelling case for Majungatholus feeding on other Majungatholus (Rogers et al, 2003).
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...ories of why dinosaurs went extinct abound, and as there is no theory yet to be truly confirmed as the “right one”, my theory of dinosaur cannibalism is also purely anecdotal. The discovery of the cannibalistic Majungatholus atopus in Madagascar is an important scientific find because it confirms a long-standing theory of cannibalism among certain carnivorous dinosaurs. Behavioral patterns of extinct animals are difficult to establish; however, these bones give authentication to previous unfounded beliefs about the ancient feeding practices of some dinosaurs.
“A sandwich is a sandwich, but a manwich is a meal”
-Jeffery Dahmer
References
Perkins, Sid.2003 Family Meal: Cannibal dinosaur known by its bones. Science News, vol.163: p.211
Rogers,Raymond; et al. 2003. Cannibalism in Madagascan dinosaur Majungatholus atopus. Nature, vol.422: pp.515-518.
The question of what caused the extinction of megafauna during the Late Pleistocene period is one that archaeologists have struggled to answer for decades, but why should it matter? Discovering with certainty the cause of megafaunal extinction would simultaneously prove or disprove any of the proposed implications of each existing theory regarding this massive extinction.
Dinosaur fossils are one of the few ways in which scientists can study the history of life on earth millions of years ago. Each new discovery is unique in its own way and provides valuable information about the past. No two finds are exactly identical; therefore, when dinosaur remains are uncovered, the possibility and excitement of new information or even a new species exists. Until the year 2000, no dinosaur has ever been found with a fossilized heart. Scientists at North Carolina State University and the North Carolina Museum of Natural Sciences discovered a sixty-six million year old Thescelosaurus with a heart.
Dinosaurs are often compared to and resemble modern day reptiles. Scientists will study how these modern day reptiles behave, look, act, and move to draw conclusions on how the dinosaurs would behave, look, act, and move. They also look at the intern make-up of the modern reptiles to predict how the dinosaurs internal make up would be. However, a recent discovery in South Dakota is stirring up some controversy (Hesman). While Mike Hammer was walking around a ranch in South Dakota he stumbled across a “big-eyed” dinosaur that he now refers to as Willo. The thing that caught his eye was the chest cavity of the dinosaur, upon further investigation he found a rock that was preserved in the curve of the dinosaur’s ribs, he was convinced that this rock was once a heart. Hammer then went on to take the dinosaur fossil in for a medical X-ray scan, this X-ray showed evidence that could change how we think about dinosaurs.
On November 29, 1947, the United Nations voted for a partition resolution that led to the establishment of the nation of Israel in May, 1948. This was great news for Jews in Palestine and the diaspora as it meant the fulfillment of the quest for the rebirth of their nation in their previous homeland after many years of wandering (Pappe, 2006, p. 12). However, their Palestinian Arab counterparts opposed to the establishment from the start felt cheated by the international community and remained categorical that the final answer to the Jewish problem would only be solved in blood and fire (Karsh, 2002, p. 8).
The dinosaur Majungatholus atopus is a meat-eating dinosaur that lived 65 to 70 million years ago, during the Cretaceous period, in what is now the island of Madagascar. The Majungatholus has long been known for being a carnivorous dinosaur, but it wasn’t until recently that researchers revealed that this dinosaur was probably a cannibal. They were able to conclude that this was probably the case as a result of discovering several bones of the Majungatholus dinosaur with specific tooth marks in them that researchers have proven belonged to the Majungatholus dinosaur. In her 2003 press release for the National Science Foundation (NSF), Cheryl Dybas quoted the NSF program director Richard Lane, “this research greatly expands our understanding of how dinosaur species related to each other in the context of their environment, and also serves as a way of increasing public awareness of and appreciation for the earth sciences."1[1]
I feel that Gerber’s and Offits’ approach and perspective is much more convincing than Coghlan’s because of how they structured their article with the three hypotheses and then disproving each of them with scientific data. Furthermore, they have 39 references cited to help them come to the conclusion that vaccines are the not the link to autism. Due to the many references and case studies this article would be extremely useful to other researchers or parents interested in the vaccine-autism controversy.
The debate of whether dinosaurs were cold blooded or warm blooded has been ongoing since the beginning of the century. At the turn of the century scientists believed that dinosaurs had long limbs and were fairly slim, supporting the idea of a cold blooded reptile. Recently, however, the bone structure, number or predators to prey, and limb position have suggested a warm blooded species. In addition, the recent discovery of a fossilized dinosaur heart has supported the idea that dinosaurs were a warm blooded species. In this essay, I am going to give supporting evidence of dinosaurs being both warm and cold blooded. I will provide background information on the dinosaur that was discovered and what information it provides scientists.
Looking at the media and its affect on vaccination the article, “Media Coverage of the Measles-Mumps-Rubella Vaccine and Autism...
“Sex, Drugs, Disasters, and the Extinction of Dinosaurs” is written by Stephen Jay Gould, professor of geology and zoology at Harvard. This essay is one of more than a hundred articles on evolution, zoology, and paleontology published by Gould in national magazines and journals. It tells about scientific proposals for the extinction of dinosaurs – a confusing but an exciting problem that humanity tries to solve. By analyzing and describing each of the claims for the reptiles’ demise – sex, drugs, and disasters – Gould differentiates bad science from good science and explains what makes some theories silly speculations, while the other, a testable hypothesis.
The MMR vaccine is administered between the ages of 12-15 months. When a child develops autism, their parents describe the disease as the child growing normally until they reach an age where a degenerative process starts. This problem usually happens around the age of 2 years. Although parents do say the child was growing normally, many researchers do not believe that the child was actually growing normally until the age of 1-2 years but some children do go through a degenerative process and this usually happens after the administration of MMR vaccine. The question is does MMR have a true relation with the development of autism or is it just a coincidence?
Over the last twenty years there has been a very large increase in the number of mandatory vaccinations, which leads many people to believe that the increase in the number of vaccinations has a direct correlation with the increase of childhood Autism. “Today, 40 percent of American parents have chosen to delay or refuse a recommended or mandated vaccine for their children (Largent, 18)”. Many parents are too young to remember when communicable diseases could ravage a classroom or school. Polio could paralyze ten thousand children in a year. Rubella coul...
...e. "A Hypothesis to Explain the Role of Meat-Eating in Human Evolution." Www.cnr.berkely.edu. 4 Feb. 2001. Web. .
During the Bronze Age, the Minoan civilization; situated on the cultural bridge Island of Crete, greatly influenced the Aegean Islands as well as the Greece mainland (75). Though they were not Greeks, the Minoans kept detail records in a form of Greek. These peoples were ruled by a King who was supported by a bureaucracy and centered on a palace (75). This form of organization was typical of many early civilizations but changed tremendously after this age (75). After the Minoans, the Mycenaeans arose and ruled in a similar fashion to the Minoans. The Mycenaeans; though also non-Greek, settled in the Greek mainland and was ruled by a King who held a royal domain, was given the ability to appoint officials, and to command servants among other responsibilities (77). After the fall of the Mycenaean empire, many Greek peoples spread eastward, ended trade with the old civilizations, and internally throughout parts of Greece (78). This period led Greek peoples to move into smaller communities with little communication between them (78). The initial organization of the Minoan and Mycenaean civilizations were as close to unification as Greek history allowed until the Macedonians arrived. However, these successful civilizations were not Greek but situated themselves on what became Greece and merely demonstrated a slight similarity in language. After the fall of the Mycenaean civilization, Greeks entered though disorganized and independent.
... more epidemic outbreak of other deadly diseases. Rep. Henry Waxman states, “Yet as we in crease research, we must also make sure that every parent knows that the best available science does not support a link between vaccines and autism” (662 Waxman).
Fama et al. (1969) portrayed a stock market where all available information is reflected in its prices. Any newly disclosed information would cause an immediate reaction, and prices would be fully re-evaluated and adjusted to a new fair value that incorporate