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Happiness, or the state of being happy, is a human emotional condition. The definition of happiness is a common philosophical topic. Some define it as experiencing the feeling of positive emotional affects, while avoiding the negative ones. [328] [329] Others see it as an appraisal of life satisfaction or quality of life. [330]
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.
Human taxonomy is the classification of the human species (systematic name Homo sapiens, Latin: "wise man") within zoological taxonomy. The systematic genus , Homo , is designed to include both anatomically modern humans and extinct varieties of archaic humans .
Homo (from Latin homÅ 'human') is a genus of great ape (family Hominidae) that emerged from the genus Australopithecus and encompasses only a single extant species, Homo sapiens (modern humans), along with a number of extinct species (collectively called archaic humans) classified as either ancestral or closely related to modern humans; these include Homo erectus and Homo neanderthalensis.
According to Kelly, human beings and animals are morally valued and entitled to the status of persons because they are complex organisms whose multitude of psychological and biological components are generally unified towards a singular purpose in any moment, existing and operating with relative harmony.
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.
A human person who lacks the ability to think rationally (either because she is too young or she suffers from a disability) is still a human person because of her nature. Consequently, it makes sense to speak of a human being’s lack if and only if she is an actual person.
Human evolution is the evolutionary process within the history of primates that led to the ... being an example of a recent species of the genus Homo that exhibits ...