If the U.S. Supreme Court doesn't intervene in its case and it doesn't find an American buyer, TikTok will be illegal in the U.S. on January 19th. Would the effects be visible immediately, and what are its young users likely to do without it? We're also reporting on a historic party in America, the advent of robotic farming in Australia, and the 18th Century "smartwatch" that was fit for a French queen who never got the chance to use it. Finally: Santas on motorcycles!