The disparity in lifespan between canines and humans is a complex phenomenon influenced by a confluence of factors. Size, breed, genetics, and lifestyle all contribute to the relatively shorter existence experienced by domestic dogs compared to their human companions. Larger breeds, for instance, tend to have shorter lifespans than smaller breeds.
Understanding the biological mechanisms underlying aging in different species has broad implications. Research into canine longevity can provide insights into age-related diseases affecting both dogs and humans, potentially leading to improved preventative care and treatments. Historically, the selective breeding practices that have shaped canine diversity have also inadvertently impacted their lifespans.