Summaries Synchrony and Casual Relations Between Permian-Triassic Boundary Crises and Siberian Flood Volcanism" by Paul R. Renne‚ Zhang Zichao‚ Mark A. Richards‚ Michael T. Black‚ Ashish R. Basu The paper focuses on the mass extinction that took place at the Permian-Triassic (P-T) boundary‚ as the greatest bio-crisis on Earth‚ whereby almost 90% of the marine species and 70% of terrestrial species were eliminated. This paper regards the Siberian traps‚ the most significant "continental flood volcanism
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Frogs re-evolved "lost" bottom teeth after more than 200 million years‚ according to new research. Tree-dwelling Gastrotheca guentheri are the only frogs with teeth on both their upper and lower jaw. The reappearance of these lower teeth after such a long time fuels debate about whether complex traits are lost in evolution or if they can resurface. Scientists suggest this new evidence identifies a "loophole" in previous theories. The Gastrotheca genus of frogs carry eggs on their backs Commonly
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The abrupt extinction of the megafauna during the Pleistocene in North America dwindled the large animal population to about 70 percent (Martin). The cause of this massive extinction is unclear due to lack of evidence during this time‚ but there are many subjective beliefs that involve both ecological and environmental forces. An ecological force such as human hunters are one hypothesis that is believed to have caused the extinction of the megafauna. This hypothesis is known as the “overkill hypothesis
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Why did the finches of the Galapagos Islands die around the dry season of 1977? This has been an important question lately. The answer to this question actually starts a year before in the dry season of 1976. In this season there was a drought. The temperature was higher than usual‚ and the rainfall was minimal. Actually no rain fell. This drought led to a chain of events that ended up with the finches dead. The first part of the chain occurred when the drought caused the plants to not produce as
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Animal Group Hippopotamuses‚ also called Hippos‚ are large mammals. Their name which means “river horse” in Greek‚ gives a clue about their lives. Thy spend most of their time swimming in rivers and lakes. There are two species‚ or kinds of Hippos‚ one is the Nile‚ or Common‚ Hippo. These hippos are more abundant and a better known type. The other is the pygmy hippo‚ which is less familiar to people because it is rarely seen. Hippopotamuses are related to pig‚ camels and giraffes. All these animals
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A. R. Professor Sandy ARCH131-01 The Hudson-Meng Bison Bonebed Site The bison bonebed at the Hudson-Meng site illustrates the importance of taphonomy. This is because taphonomy shows how things have become a part of the fossil record; how natural processes contribute to the formation of archaeological sites‚ which‚ in turn‚ helps define patterns that should be interpreted in human behavioral terms. The bones were confined to an area approximately 100 square meters‚ and
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4. A study of palaeontology and past environments increases our understanding of the possible future range of plants and animals Explain the importance of the study of past environments in predicting the impact of human activity in present environments: • The knowledge gained from palaeontology (fossils) and the study of past environments can help us to understand present day ecosystems • This knowledge can be used to predict and determine the future for Australia’s plants and animals • Palaeobiologists
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There have been so many things discussed throughout these couple of months‚ everything from fossils‚ to Neanderthals‚ to evolution. From the beginning of evolution‚ our very start‚ our closest relative a chimpanzee‚ and modern man. We have gone through this journey and I have witnessed what the past looked like and made me appreciate my present. There are some incredibly specific items that need to be present in order for fossils to be procured‚ and they are only found in water‚ caves‚ or volcanoes
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The Ancient Traveler Look at those bones embedded in the tightly packed sediment. They may be human said Mark Wells. Dr. Samantha Clark took a close look‚ shaking her head‚ not believing a human had lived 100‚000 years ago. The dig had been full of surprises‚ trying to move the tools and volunteers safely down the 85-foot sinkhole had been a challenge. Moreover‚ the fossils found were well over 100‚000 years old. The animals included an American lion‚ camel and mammoth. While the discovery in northern
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It has long been wondered by scientists just how the giraffe evolved to have its long neck. The giraffe‚ world’s tallest mammal‚ was thought to have developed its neck to enable it to find food in higher places‚ and that it made it easier for the animal to fight predators. A new study‚ however‚ proves that the evolution of the giraffe’s neck came in several stages. First‚ the neck vertebrae reached into the mammal’s neck‚ and millions of years later‚ the vertebrae extended to the tail. This is the
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