As prediction markets like Kalshi and Polymarket offer more ways to bet on elections, war, the Oscars and more, their dangers are growing.

President Trump says he'll end the war soon, when he wants to, as Iran hits ships in and near the Strait of Hormuz and warns U.S.-linked banks will be next.

Many years ago, when I was young, my friends and I loved exploring abandoned buildings. On one of those nighttime excursions, ...