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In world demographics, the world population is the total number of humans currently alive. It was estimated by the United Nations to have exceeded eight billion in mid-November 2022. It took around 300,000 years of human prehistory and history for the human population to reach a billion and only 218 more years to reach 8 billion.
The current world population growth is approximately 1.09%. [5] People under 15 years of age made up over a quarter of the world population (25.18%), and people age 65 and over made up nearly ten percent (9.69%) in 2021. [5] The world's literacy rate has increased dramatically in the last 40 years, from 66.7% in 1979 to 86.3% today. [13]
The human brain perceives the external world through the senses, ... Happiness, or the state of being happy, is a human emotional condition. The definition of ...
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.
Anthropocentrism (/ ˌ æ n θ r oʊ p oʊ ˈ s ɛ n t r ɪ z əm /; [1] from Ancient Greek ἄνθρωπος (ánthrōpos) 'human' and κέντρον (kéntron) 'center') is the belief that human beings are the central or most important entity on the planet. [2]
Human taxonomy is the classification of the human species within zoological taxonomy. The systematic genus , Homo , is designed to include both anatomically modern humans and extinct varieties of archaic humans .
Fertilization is the fusing of the gametes; a sperm cell and an ovum (egg cell) fuse to form a single-cell zygote.This is the beginning of the diploid phase of the human life cycle after two genetically unique haploid cells created via meiosis and chromosomal translocation combine their DNA and begin to develop into a multi-cellular organism.
It examines human history as a whole, starting with the evolution of human-like species. [129] The terms macrohistory , mesohistory , and microhistory refer to different scales of analysis, ranging from large-scale patterns that affect the whole globe to detailed studies of local contexts , small communities, family histories , particular ...