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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.
Many particles combine chemically in a manner which depletes oxygen, causing estuaries to become anoxic. Pesticides and toxic metals are similarly incorporated into marine food webs, harming the biological health of marine life. Many animal feeds have a high fish meal or fish hydrolysate content. In this way, marine toxins are transferred back ...
The evidence for global warming due to human influence has been recognized by the national science academies of all the major industrialized countries. [9] In the scientific literature , there is a very strong consensus that global surface temperatures have increased in recent decades and that the trend is caused by human-induced emissions of ...
Part of the built environment – suburban tract housing in Colorado Springs, Colorado. Human ecology is an interdisciplinary and transdisciplinary study of the relationship between humans and their natural, social, and built environments.
A researcher claims to have found evidence of humans in Chesapeake Bay over 22,000 years ago. The assertion is yet another recent announcement claiming to push the arrival of humans in North ...
Evidence for the evolution of Homo sapiens from a common ancestor with chimpanzees is found in the number of chromosomes in humans as compared to all other members of Hominidae. All hominidae have 24 pairs of chromosomes, except humans, who have only 23 pairs. Human chromosome 2 is a result of an end-to-end fusion of two ancestral chromosomes ...
Human science is an objective, informed critique of human existence and how it relates to reality.Underlying human science is the relationship between various humanistic modes of inquiry within fields such as history, sociology, folkloristics, anthropology, and economics and advances in such things as genetics, evolutionary biology, and the ...
Other evidence of modern human presence in China has been dated to 80,000 years ago. [21] The most significant out of Africa dispersal took place around 50,000–70,000 years ago via the so-called Southern Route, either before [48] or after [32] [33] the Toba event, which happened between 69,000 and 77,000 years ago. [48]