No one had ever figured out why early humans had separated themselves from all creation by taking their knuckles off the ground and standing up. It was to breathe! To open their throats, swell out their chests, and suck in air better than any other creature on the planet. But that was just the beginning. Because the better you are at breathing, David quickly realized, the better you are at— “Running? You’re saying humans evolved to go running?”
