Massive blood loss, known as MBL in the medical world, is a major cause of death during cardiac surgery--and an accepted one, because it's the best option we have. Blood transfusions help, but those aren't without complications, either. A new device could cut that step out of the process for some patients by collecting the blood from a surgery, concentrating the blood cells, and routing it intravenously right back to the person on the table.
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.