Add Yahoo as a preferred source to see more of our stories on Google. Hovering blue flames that flicker over bogs and marshes have inspired ghostly folktales for centuries. Known as “will-o’-the-wisp, ...

A street performer in Vietnam turns ordinary soap bubbles into a glowing spectacle using ultraviolet lighting. The bubbles shine brightly under blacklight as they float, stretch and expand through the ...

(CNN) — 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” ...