An excellent summation of how and why we became what we became.
"Harvard Professor, Daniel Lieberman discusses how to many, a massive brain is the quintessential human trait, but humans are also superlative endurance athletes compared to other mammals, especially in the ability to run long distances in the heat. In fact, the evolution of endurance made possible the evolution of large brains, and is so fundamental to our species' biology that vigorous endurance exercise is necessary for physical and mental health."
"While living I want to live well." - Geronimo