
Adaptation is a cross‑disciplinary concept describing how organisms, cultures, and artworks adjust to environments, contexts, or media. In biology it denotes traits shaped by natural selection; in social sciences it concerns adjustments of human systems; in the arts it refers to transforming works across media.

Human evolution is the lengthy process through which modern humans developed from early hominins over approximately six million years, characterized by significant anatomical and behavioral changes.

Mammals are endothermic vertebrates distinguished by hair, mammary glands that produce milk, and three middle ear bones; they occupy diverse habitats worldwide and include monotremes, marsupials, and placentals.

Paleontology is the scientific study of ancient life through the examination of fossils, encompassing the evolution, interactions, and environments of organisms across Earth's history.

Symbiosis refers to the close and long-term biological interaction between two different biological organisms, which can be mutualistic, commensalistic, or parasitic in nature.

A symbiotic relationship, or symbiosis, is any type of a close and long-term biological interaction between two different biological organisms of different species. These interactions can be categorized based on the effect they have on each organism, with the primary types being mutualism, commensalism, and parasitism. The concept is a fundamental aspect of ecology and evolutionary biology.

Walking is the primary form of bipedal, terrestrial locomotion in humans and other legged animals. Characterized by a gait in which one foot is always in contact with the ground, it is a fundamental human activity with significant evolutionary, physiological, and cultural importance. It serves as a common mode of transport, a popular form of physical exercise, and a recreational activity.