While Santa Claus brings joy and gifts to good children, there's a darker figure lurking in European Christmas traditions. Krampus, a half-goat, half-demon creature, roams the streets punishing ...

On the cracked ice of Jupiter’s moon Europa, a sprawling pattern of dark lines has taken on an unsettling nickname: a “demon” that looks uncannily like a spider. The feature is not a creature at all, ...