EnvironmentThe gold hydrogen rush: Does Earth contain near-limitless clean fuel? Prospectors around the world are scrambling to find reserves of "gold hydrogen", a naturally occurring fuel that burns without producing carbon dioxide. But how much is really out there and how easy is it to tap into? Features
TechnologyFlexible needle goes soft after injections for safety and comfort Needles and catheters can irritate the body and may pose a risk to others if not properly disposed of, but a flexible alternative made from gallium solves both problems 51¶¯Âþ