The Druids of ancient Celtic culture have long been shrouded in mystery, often depicted as wise priests, sorcerers, or even human sacrificers. But how much of what we "know" about them is true?

and much more ancient, roots. Costumed trick-or-treating takes its inspiration from the Celtic holiday Samhain—“summer’s end” in Irish—more than 2,000 years ago. Samhain marked New Year ...