Enzymes are the workers in our body that make everything function, by enabling chemical reactions. All living cells contain enzymes. They are hard to visualize, since they are not something tangible, but our lives depend on them....
After seizing power in a bloody CIA-backed coup, General Augusto Pinochet ruled Chile with a rod of iron for two decades, during which human rights violations became the norm of Chilean life....
A Marine company commander I knew of had a memorable way of introducing himself to his platoon commanders. He called them into his office, gave them each a laminated wallet card, then dismissed them without saying a word....