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Woolly mammoth research paper
Woolly mammoth research paper
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The Pleistocene epoch spanned from 1.8 million years ago to 10,000 years ago [1]. Many genera and even species such as conifers, mosses, flowering plants, insects, mollusks, birds, and mammals from that era still survive today [1]. Others, such as the long-horned bison, saber-toothed cats, giant ground sloths, and the mammoth did not survive [1].
The woolly mammoth was commonly found during the last ice age [2]. These animals were similar in size to today’s elephants but were adapted for living in the extremely cold conditions typical of an ice age [2]. Mammoths had narrower skulls, shorter tails, and smaller ears than elephants do, and they were protected by a full coat of coarse hair that secreted oils and insulated them from the cold [2]. The mammoths also had tusks that they used to clear away snow in their search for food [2].
Mammoths went extinct approximately 4,000 years ago after their numbers began to diminish about 10,000 years ago [2]. Mammoth fossils have been uncovered on every continent except for South America and Australia [2]. It is not entirely clear what led to the extinction of the mammoth [2]. Some of the current theories for their extinction include climate change, meteorites or comets, and predation by humans [2].
The most recognized reason for the mammoth’s disappearance is that as the Earth warmed, the climate became too much for the mammoths to handle since they had evolved in a cold environment [2]. It is also possible that the global climate change led to the extinction of some of the mammoth’s vital mineral-supplying plants which in turn led to the extinction of the mammoth [2].
Researchers have also found some evidence of an asteroid hitting the Earth which may have resulted in a massive climate ch...
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...ts and more species will begin to go extinct [13].
Other researchers believe that bringing back the mammoth and other extinct species will increase conservation efforts [4]. They argue that by creating more species that are in need of a home, people will be driven to preserve land where they can survive [4]. In fact, a nature preserve covering a sixty-square-mile area has already been established in Siberia in the hopes that it will one day soon be inhabited by mammoths [4].
While society may not currently be ready for the revival of creatures that went extinct thousands of years ago, technology certainly has that goal in its sights. Since cloning and genome sequencing techniques are still in need of refinement, it will give naysayers time to come to terms with researchers aspirations. After all, it seems that sooner or later, mammoths will walk the Earth again.
Humans have driven many animals extinct, but should we bring them back is the question. Geneticists, biologists, conservationists and ethicists gathered to discuss the controversies. Some people say in doing this we are playing God, while others say we did by killing them. Other scientist say that it may be beneficial because it will add biodiversity, and medicinal properties back to the ecosystem. It is only possible to bring species back from around 10 thousand years ago. Recently scientists have vastly improved the cloning process. We can now coax adult animal cells into any type of cell, including eggs and sperm, then manipulating them into full-fledged embryos, which has led to the ideas and developments of reviving many other species including mammoths, frogs and
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.
Rubensteina, D.R., Rubensteinb, D.I., Shermana, P.W., Gavic T.A., 2006. Pleistocene Park: Does re-wilding North America represent sound conservation for the 21st century? Biological conservation 132, 232-238.
There are many theories on why the Neanderthals disappeared. Most of them involve Homo Sapiens in one way or another, considering that the Neanderthal's extinction coincides with the early human's estimated arrival in Europe from their original home in Africa.
The biggest mass extinction of the past 600 million years (My), the end-Permian event (251 My ago), witnessed the loss of as much as 95% of all species on Earth. Key questions for biologists concern what combination of environmental changes could possibly have had such a devastating effect, the scale and pattern of species loss, and the nature of the recovery. New studies on dating the event, contemporary volcanic activity, and the anatomy of the environmental crisis have changed our perspectives dramatically in the past five years. Evidence on causation is equivocal, with support for either an asteroid impact or mass volcanism, but the latter seems most probable.
Wong first discusses the possibility that harsh climate killed the last Neandertals. Analysis of isotopes in ocean sediments, ice, and in pollen from the time of the Neandertals reveals that during a period known as oxygen isotope stage 3 (OIS-3), which occurred about 65,000 to 25,000 years ago, there was a climate shift, from moderate to glacial. However, this was probably not what killed the Neandertals, due to the fact that Neandertal anatomy was even better suited for colder climates, with their shorter limbs, barrel chest, and short stature better at conserving body heat (lecture). It is more likely that the severe and rapid environmental shift resulted in the demise of the Neandertals, which could have resulted in a change from forests to grasslands and a change in plants and animals in a short period of time, even over the lifetime of one individual, and just as quickly it could have changed back. The Neandertals, therefore, would have had to adjust to the new environment quickly in order to survive.
Mountain building and climate changes happened often in this period, as well as the breakup of Pangaea. Mammals were very popular and they were very different and everywhere. The climate was much colder now. The animals adapted to their environment and diets; meat eaters had sharp teeth for cutting and ripping, rodents had self-sharpening front teeth for gnawing and plant eaters had molars for grazing plants.
The Pleistocene epoch is a well-known time period thanks to the glorification of now extinct megafauna as well as the proximity to our current epoch. Through the rapid climate changes and glaciation that occurred many times during this epoch, the fauna
The extraterrestrial impact theory is that scientists have found logical evidence for if there was a large asteroid. The biggest point of evidence for it being an asteroid was that there was a 150 kilometer wide crater that was found off the coast of the Yucatan peninsula. Scientists calculated that the asteroid or comet was traveling at 30 kilometers per second. For months, scientists concluded that after the impact, clouds of dust blocked the sun and cooled the Earth to a deadly level for plants, and inturn many animals. After the dust settled, greenhouse gasses created a smolder...
...he demise of Neanderthals, their influx put immense demand on already constrained resources, there was little available food during the ice age because only those species best adapted to the harsh environment could survive. Homo Sapiens however, had a different way of thinking and created different tools making them better equipped for hunting, this meant that Homo Sapiens obtained food more easily, which was necessary for survival, this led to Neanderthals being outcompeted and their numbers began to diminish.
Extinction is no longer just a natural process. It is an enemy, slowly changing our world into a barren wasteland where life is as rare as a flower in the Arctic Circle's winter. The wolf, the tiger, the caribou, the elephant, the bison, the cheetah, the sequoia cactus, the redwood tree – all of these and so many more things are on the verge of disappearing from our planet forever. Extinction is the most pressing environmental issue of our time, because if it continues the way it is going without anything being done to counteract its causes and consequences, there will soon be no environment left for there to be debates about.
Voelker, Roger B. ¡§Who¡¦s Afraid of the Human Genome?¡¨ Hastings Center Report, July/August 1989: 19-21.
Now you might ask yourself, "why are so many animals vanishing off the face of this earth?" Well, there are several different causes for the extinction of hundreds of endangered species. As I already stated, the majority of this lies on the shoulders of the disgraceful, careless measures taken by the human race. Hunting is one of the main reasons for animals in the wild becoming extinct. The animals are sought after for food, for their skin, and in some cases, even their bones. Water pollution and air poll...
Bison, like many species, have come a long way since the dawn of time. Bison have grown along side humans and humans took advantage of the bison to near extinction. Now bison have been struggling to survive but are luckily still around today but not in every place it used to be. The history of bison go far back to when species are still young on land.
The extinction of the Tyrannosaurus Rex was obviously due to the same reason. Every other living species was killed sixty five million years ago. Although it is believed that the asteroid theory is the cause of extinction of the Crustaceous Period, we cannot be positive. The environmental effects of this problem were that the dinosaurs living during this period perished from the earth and their extinction remains a mystery to us to this day. All we can do to reenact what happened is use the technology we have in the twenty first century to find more evidence to see what went wrong so long ago. By discovering things like what happened to the Tyrannosaurus Rex we can use this information to prevent an event such as a mass extinction from happening a second time.