Humans

Humans (Homo sapiens) are a species of primate belonging to the family Hominidae. They are characterized by bipedalism, a large brain relative to body size, and the use of language and tools. Alternative terms in Somali include baniaadan, biniaadan, insaan, and dadyow.

Humans inhabit all continents, having settled diverse environments through the transmission of knowledge across generations, known as culture. The world population approached three billion in the twenty-first century, with growth rates varying by region.

Classification and origins

Following standard biological classification, humans are placed as follows: kingdom Animalia, phylum Chordata, class Mammalia, order Primates, family Hominidae, genus Homo, species sapiens. The closest living relatives are large apes such as chimpanzees and bonobos; the lineages diverged several million years ago.

Fossil and genetic evidence indicates that Homo sapiens originated in Africa and subsequently spread to other continents. Major sites of early fossil discoveries include East and North Africa.

Physiology and biology

Humans are mammals that typically produce one offspring at a time, with a gestation period of approximately nine months. The brain governs speech, memory, and planning. Diet is omnivorous, including plants and meat, and cooking of food is common practice. Life expectancy depends on health, nutrition, and social conditions.

Language, culture, and society

Language is the most distinctive human feature, allowing knowledge to be stored, transmitted, and developed. Societies have established systems of governance, law, commerce, and art. Agriculture and permanent settlements led to cities, writing, and states; the development of modern technology has transformed labor, transport, and communication.