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Stephen Bentley Et Al Biography & Facts

Modern humans evolved in Africa around 300,000 years ago and initially lived as hunter-gatherers. They migrated out of Africa during the Last Ice Age and had populated most of the Earth by the end of the Ice Age 12,000 years ago. Soon afterward, the Agricultural Revolution began in the fertile river valleys of West Asia: humans began the systematic husbandry of plants and animals, and many humans transitioned from a nomadic life to a sedentary existence as farmers in permanent settlements. The growing complexity of human societies necessitated systems of accounting and writing. During the late Bronze Age, Hinduism developed in the Indian subcontinent, while the Axial Age witnessed the growth and institutionalization of religions such as Buddhism, Confucianism, Jainism, Judaism, Taoism, and Zoroastrianism. As civilizations flourished, ancient history was marked by the rise and fall of empires. The subsequent post-classical history, from about 500 to 1500 CE, witnessed the rise of Christianity and Islam. The early modern period, from about 1500 to 1800 CE, saw the Age of Discovery and the Age of Enlightenment. By the 18th century, the accumulation of knowledge and technology had reached a critical mass that brought about the Industrial Revolution and began the late modern period, which started around 1800 CE and continues. The increase in productive power has been accompanied by an expansion of international trade and colonization, linking the different civilizations in the process of globalization. Despite the devastating impact of the two world wars, the rates of growth in various domains have greatly accelerated over the last quarter-millennium, including human population, agriculture, industry, commerce, scientific knowledge, technology, communications, weapon destructiveness, and environmental degradation. Prehistory (c. 3.3 million years ago – c. 3000 BCE) Human evolution Humans evolved in Africa from great apes through the lineage of hominins, which arose 7–5 million years ago and includes chimpanzees and bonobos. The ability to walk on two legs emerged after the split from chimpanzees in early hominins, such as Australopithecus, as an adaptation possibly associated with a shift from forest to savanna habitats. Hominins began to use rudimentary stone tools c. 3.3 million years ago, marking the advent of the Paleolithic era. The genus Homo evolved from Australopithecus. The earliest record of Homo is the 2.8 million-year-old specimen LD 350-1 from Ethiopia, and the earliest named species is Homo habilis which evolved by 2.3 million years ago. The most important difference between Homo habilis and Australopithecus was an increase in brain size. H. erectus evolved by 2 million years ago and was the first hominin species to leave Africa and disperse across Eurasia. Perhaps as early as 1.5 million years ago, but certainly by 250,000 years ago, hominins began to use fire for heat and cooking. Beginning about 500,000 years ago, Homo diversified into many new species of archaic humans such as the Neanderthals in Europe, the Denisovans in Siberia, and the diminutive H. floresiensis in Indonesia. Human evolution was not a simple linear or branched progression but involved interbreeding between related species. Genomic research has shown that hybridization between substantially diverged lineages was common in human evolution. DNA evidence suggests that several genes of Neanderthal origin are present among all non-sub-Saharan African populations. Neanderthals and other hominins, such as Denisovans, may have contributed up to 6% of their genome to present-day non-sub-Saharan African humans. Early humans Homo sapiens emerged in Africa around 300,000 years ago from the species Homo heidelbergensis. Humans continued to develop over the succeeding millennia, and by 100,000 years ago, were already using jewelry and ocher to adorn the body. By 50,000 years ago, they buried their dead, used projective weapons, and engaged in seafaring. One of the most important changes (the date of which is unknown) was the development of syntactic language, which dramatically improved the human ability to communicate. Signs of early artistic expression can be found in the form of cave paintings and sculptures made from ivory, stone, and bone, implying a form of spirituality generally interpreted as animism or shamanism. Paleolithic humans lived as hunter-gatherers and were generally nomadic. The migration of anatomically modern humans out of Africa took place in multiple waves beginning 194,000–177,000 years ago. The dominant view among scholars is that the early waves of migration died out and all modern non-Africans are descended from a single group that left Africa 70,000–50,000 years ago. H. sapiens proceeded to colonize all the continents and larger islands, arriving in Australia 65,000 years ago, Europe 45,000 years ago, and the Americas 21,000 years ago. These migrations occurred during the most recent Ice Age, when various temperate regions of today were inhospitable. Nevertheless, by the end of the Ice Age some 12,000 years ago, humans had colonized nearly all ice-free parts of the globe. Human expansion coincided with both the Quaternary extinction event and the Neanderthal extinction. These extinctions were probably caused by climate change, human activity, or a combination of the two. Rise of agriculture Beginning around 10,000 BCE, the Neolithic Revolution marked the development of agriculture, which fundamentally changed the human lifestyle. Agriculture began independently in different parts of the globe, and included a diverse range of taxa, in at least 11 separate centers of origin. Cereal crop cultivation and animal domestication had occurred in Mesopotamia by at least 8500 BCE in the form of wheat, barley, sheep, and goats. The Yangtze River Valley in China domesticated rice around 8000 BCE; the Yellow River Valley may have cultivated millet by 7000 BCE. Pigs were the most important domesticated animal in early China. People in Africa's Sahara cultivated sorghum and several other crops between 8000 and 5000 BCE, while other agricultural centers arose in the Ethiopian Highlands and the West African rainforests. In the Indus River Valley, crops were cultivated by 7000 BCE and cattle were domesticated by 6500 BCE. In the Americas, squash was cultivated by at least 8500 BCE in South America, and domesticated arrowroot appeared in Central America by 7800 BCE. Potatoes were first cultivated in the Andes of South America, where the llama was also domesticated. It is likely that women played a central role in plant domestication throughout these developments. Various explanations of the causes of the Neolithic Revolution have been proposed. Some theories identify population growth as the main factor, leading people to seek out new food sources. Others see population growth not as the cause but as the effect of the associated improvements in food supply. Further sugg.... Discover the Stephen Bentley Et Al popular books. Find the top 100 most popular Stephen Bentley Et Al books.