The epidemiological link between red meat and cancer is no longer debatable – what remains uncertain is how exactly this happens, and why the human species appears to be unique in its susceptibility.
Heart disease is the number one human killer, but most other members of the animal kingdom are much less susceptible to it than we are. What is it about other animals that has allows them to dodge this epidemic while we humans suffer? Linus Pauling thought Vitamin C was the answer; Robert Sapolsky has pinned the blame on stress. But what theory do you believe?