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In scholarship, a secondary source [4] [5] is a document or recording that relates or discusses information originally presented elsewhere. A secondary source is one that gives information about a primary source. In a secondary source, the original information is selected, modified and arranged in a suitable format.
Human history is the record of humankind from prehistory to the present. 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 spread across Earth's continental land except Antarctica by the end of the Ice Age 12,000 years ago.
Genetics provides key information about the evolutionary origins of humans as a species, human migration, ancestry, and demographic changes. [213] Anthropologists investigate human culture and behaviour, such as social structures, belief systems, and ritual practices. This knowledge offers contexts for the interpretation of historical events. [214]
The timeline of human evolution outlines the major events in the evolutionary lineage of the modern human species, Homo sapiens, throughout the history of life, beginning some 4 billion years ago down to recent evolution within H. sapiens during and since the Last Glacial Period.
Scientists say they have recovered the oldest known Homo sapiens DNA from human remains found in Europe, and the information is helping to reveal our species’ shared history with Neanderthals.
History is the systematic study of the past. As an academic discipline, it analyzes and interprets evidence to construct narratives about what happened and explain why it happened, focusing primarily on the human past. Some theorists categorize history as a social science, while others see it as part of the humanities or consider it a hybrid ...
The span of recorded history is roughly 5,000 – 5,500 years, beginning with Sumerian cuneiform, the oldest form of writing discovered so far. Although the ending date of ancient history is disputed, currently most Western scholars use the fall of the Western Roman Empire in 476 AD or the coming of Islam in 632 AD as the end of ancient history.
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