Hair, a defining physical attribute of humans, is an intricate aspect of our biology. Its presence on our heads, specifically, has fascinated both scientists and laypeople alike, leading to the exploration of the intriguing question: why do we grow hair on our heads? The answer to this query lies in a complex interplay of evolutionary, physiological, and social factors.
From an evolutionary perspective, hair is believed to have provided our ancestors with essential protection against the elements. The dense network of hair strands served as a natural insulator, shielding their scalps from excessive heat and cold. Moreover, hair is an effective barrier against ultraviolet radiation, protecting the scalp from sun damage and reducing the risk of skin cancer.