Enlarge / Monkey One: "Smash! Bash! Crunch!" Monkey Two: "What is life?"M. Haslam reader comments 7 Share this story On the rocky slopes of Brazil's Serra da Capivara National Park, a group of small monkeys called capuchins are pounding rocks together. One grabs a sizable stone, grips it in both hands, and pounds it down like a hammer on another stone....