On Comparative Longevity In Man And The Lower Animals is a scientific book written by E. Ray Lankester. The book examines the lifespan of humans and animals and investigates the factors that contribute to their longevity. Lankester compares the lifespan of humans with that of various animals, including dogs, cats, horses, and mice. The book explores the role of genetics, environment, and lifestyle in determining lifespan. It also discusses the impact...