You can’t buy absolution—at least, not anymore—but $1.99 will help you get there. A new app for the iPad, iPhone, and iPod Touch has been “developed for those who frequent the sacrament and those who wish to return” in what is the first known imprimatur to be given for an iPhone or iPad app. Can we get an Amen?
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.