Warm-climate species migrate or go extinct.

A great potential pitfall is judging the 99.9+% of humanity that cannot or will refuse to comprehend this essay’s message, and it is almost always their victim-oriented mindset that is their barrier to comprehension. People cannot be talked out of thinking like victims; only experience can shatter their paradigm. Brian’s question regarding whether . I consider humanity a semi-sentient species; the potential for sentience is there, but is rarely realized, as people traded their sentience for the promise of security in a world of scarcity.

Species extinction is a great moral wrong - Elsevier …

Seafloor communities devastated, up to 50% of seafloor  species go extinct.

Extinction of Species Essay – Free Papers and Essays …

As the megafauna that fueled humanity’s global expansion went extinct, all human populations became relatively immobile, and even hunter-gatherers had proscribed ranges. There were no more virgin continents to fill with people, and then humans began to turn on each other in earnest as they fought over their reduced energy supplies. Between the and the human warfare of the late hunter-gatherer phase, there seems to have been an intermediate stage that lasted from up to a million years ago among . Until hunter-gatherers began forming segmented societies (with some hierarchy) in the past 30 thousand years or so, the risks of killing one’s neighbor outweighed the advantages, especially when resolving conflicts meant easily moving to new, unoccupied lands. Although there was probably plenty of interpersonal violence, warfare did not appear until there was resource competition among the humans that conquered Earth. It is even speculated that when left Africa nearly two mya, it .

Essay on extinction of species - Do My Research Paper …

The culture’s killing implements abruptly appeared in the archeological record and disappeared just as fast, after the easily killable megafauna went extinct. Today’s North American megafauna are , not North American megafauna that learned to avoid humans. Bison are the only significant exception, although they came from Asia, too, and explaining their survival remains a minor curiosity, but is about the only circumstance not neatly aligned with the overkill scenario. The “” paper concluded that although the South American extinction was the greatest of all, it is the most poorly investigated and that the overkill hypothesis cannot yet be attached to South American extinctions. That may be a prudent position for a specialist who pronounces judgment only when all the evidence is in, but I will be among the most surprised people on Earth if the pattern of 50 thousand years did not continue there, especially since it had no ice sheets. There can be no more pertinent example than comparing Africa to South America. They inhabited the same latitudes and have similar climates, separated by the Atlantic Ocean. Africa was the home of humanity, where its animals had millions of years to adapt to the human presence, and Africa only lost about 10% of its megafauna (probably to human hunters with their advanced weaponry) while South America lost nearly all of its megafauna, and quickly. Climate change did it? How could it have even contributed?

Warm-climate species migrate or go extinct. Greatest mass extinction of  so far.
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The Extinction of Dinosaurs Essay Sample

Mass extinctions always have critical geophysical aspects to them, and often geochemical. Continental shelves under shallow seas, which are home to most marine life, are vulnerable to sea level and oceanic current changes. Stagnant waters, or waters that have too many nutrients dumped into them, can lose their oxygen, which triggers anoxic events that kill complex life. A continental shelf exposed to the atmosphere by a falling sea level would obviously lose its marine life, and that marine life might have had nowhere else to go. Sea levels can rise or fall for different reasons. The most obvious reason has been advancing and retreating ice sheets, as water is removed from or added to the oceans, but the aggregate continental landmass has always grown (possibly sporadically), continents can rise and can fall during the journeys of their tectonic plates, and the ocean’s collective basin has fluctuated in size, as water was hydrated into rocks, and also falling when and rising again as they fragmented. Generally, when , the continental shelves lost their marine life, and , anoxic conditions often accompanied them. There is evidence that the ozone layer has been periodically damaged, which stressed all plants and animals that the Sun directly shined on. The positions of the continents, both in relation to each other and their proximity to the equator or poles, can have dramatic effects, including impacts on global climate. Global climate changes and moving continents can turn rainforests into deserts and vice versa.

Marine event which may have marked the final extinction of . About 25% of marine invertebrate species went extinct. Rudist reefs decline.

Essay on extinction of species - Selfguidedlife

During that boring million years, changed from into hunter. They did not their biomes, but they were also respected by local predators and feared by what they hunted with their primitive weapons. At what stage big cats and other megafauna in Africa learned to avoid and its descendants is not clear, but it happened, and is thought by most scientists today to be why Africa retained its megafauna, and to a lesser extent Eurasia, when the other continents quickly lost them soon after humans appeared, which is a subject for the next chapter. But an early indicator of what probably happened, repeatedly in the coming rise and dominance of humanity, is when (or ) first made it to Flores Island about 900 kya (scientists have found tools but no human-like fossils), perhaps by rafting: a pygmy elephant, a giant tortoise, and a giant lizard all quickly went extinct. Today, it appears that once the migrants made it to Flores Island they stayed and forgot how to leave. They eventually became and lived on Flores for nearly the next million years, and went extinct soon after arrived.

Unknown, but half of trilobite species go extinct. Might be regional, but could be a major mass extinction.

Animal extinction essay | The Quay House

In , we were still recovering from our Seattle effort when we were offered for making FE. Although Dennis began , when we received that , neither of us seriously suspected that it was an entreaty from those who run the world. A year later, just before we were wiped out, Dennis received an offer of about , delivered by a CIA man who said that he represented “European interests.” It became obvious that we had attracted the attention of the people who ran the world, although the , and we . Soon after Dennis rejected the offer, our nightmare truly began, as in one of the most spectacular wipeouts in the entire history of FE attempts. When the dust settled a couple of years later, , and I would never again see the world in the same way. Mr. Professor, who helped me free Dennis from jail, . The carnage spread far and wide, distantly peripheral players had their lives wrecked, and I heard sad stories from participants even as I wrote this essay.