Scottish researchers may have found a key to preventing senior moments, by blocking a stress hormone that interferes with memory. The treatment works surprisingly fast in mice, improving their memory within a few days, and the researchers say it might be a good treatment for elderly people who want to stay sharp. They want to start human trials soon.
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.