Flip a switch on your wall and the light chases away the dark. Press a button on a remote and your television brings you entertainment and news from around the world. Set a thermostat and your home is cooled or warmed to your exact comfort level. The always-available energy that powers the comforts and conveniences of modern life is something that most of us take for granted. We don’t even have to think about it; it’s just there when we need it.