Hydrogen is making headlines as a potentially limitless clean fuel that holds more energy in a given space than lithium-ion batteries. (See “A Gold Rush for Gold Hydrogen” 5 Mar 2024.) However, as hydrogen’s benefits draw more interest, so does a key problem: the gas is hard to store.
For the first time, researchers have 3D-printed layered, living skin onto wounded areas of a living creature, preventing scarring, possible infection, and other dangers that can accompany skin grafts.
Electronic trash is laced with rare minerals and even gold—but recovering that gold from discarded computers’ circuitry has been too complex and expensive to make it worthwhile.