Wolverine is a mutant with a number of both natural and artificial improvements to his physiology. His primary mutant power is an accelerated healing process, typically referred to as his mutant healing factor, that regenerates damaged or destroyed tissues of his body far beyond the capabilities of an ordinary human. In addition to accelerated healing of physical traumas, Wolverine's healing factor makes him extraordinarily resistant to diseases, drugs, and toxins. His healing factor also dramatically affects his aging process, allowing him to live far beyond the normal lifespan of a human. Despite being born in the late 19th century, he has the appearance, conditioning, health, and vitality of a man in his physical prime. While seemingly ageless, it is unknown exactly how greatly his healing factor extends his life expectancy. Wolverine's senses of sight, smell, and hearing are all superhumanly acute. He can see with perfect clarity at greater distances than an ordinary human, even in near-total darkness. His hearing is enhanced in a similar manner, allowing him to both hear sounds ordinary humans cannot and also hear to greater distances. Wolverine is able to use his sense of smell to track targets by scent, even if the scent has been eroded somewhat over time by natural factors.Wolverine's mutation also consists of animal-like adaptations of his body, including pronounced, and sharp fang-like canines and three retractable claws housed within each forearm.