Hovering blue flames that flicker over bogs and marshes have inspired ghostly folktales for centuries. Known as “will-o’-the-wisp,” “jack-o’-lantern,” “corpse candle” and “ignis fatuus” (“foolish fire ...

The human brain is a fortress. The blood-brain barrier, a selective shield of tightly packed cells, keeps out toxins and ...

A team of scientists from China and the U.S. is pioneering the development of bubble-powered robots, which could one day replace needles for painless drug delivery into the body. Inspired by nature, ...

Spontaneous flashes of ‘microlightning’ between bubbles of gas could explain will-o’-the-wisps — flickering lights that can appear on marshlands. Researchers blew tiny bubbles of methane and air into ...