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 ...

Flashes of microlightning between microscopic bubbles of methane in water may ignite the eerie blue flames of will-o’-the wisps, new research suggests.

Dramatic footage shows the moment “gigantic jet lightning” erupted in Cabo Rojo, Puerto Rico, on Wednesday,. Video captured by Frankie Lucena shows the rare phenomenon co-occurring with the waning ...