They're not making any more real estate; not until we colonize other planets at least. Laying out our dead horizontally, and leaving them in peace forever, is becoming an expensive proposition. That's why inventor Donald Scruggs has come up with the screw-in coffin.
Holding a body vertically, it is screwed down into the ground securely, to optimize graveyards' use of space.
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.