Perhaps the deepest realization in this field is the impact of the human-animal bond. Animals are masters of emotional contagion; they mirror the anxiety of their guardians and the tension of their clinicians. Veterinary science is beginning to account for this "social environment" as a variable in medical outcomes.
From a biological standpoint, mating between humans and gorillas is genetically impossible due to millions of years of evolutionary divergence. Even if sexual contact were to occur, the gametes (sperm and egg) would not recognize each other, preventing any form of conception.
Studies now link specific diets directly to improved cognition and the prevention of diseases like pet cancer.