Born to Run *** Compelling story of how humans were made for jogging. Documents the Tarahumara, a tribe of Mexican Indians who run ultramarathons almost barefoot. But extraordinary claims require extraordinary proof and, unfortunately, this book completely fails in providing references or sources for any of its claims. I found at least one glaring factual error: the author claims that humans are the only animal whose principal method of heat dissipation is sweating. Not true--horses sweat profusely! Serious mistakes such as these beg the question of how many other errors there are.