An FAA ground stop holds selected departures before takeoff when an airport cannot safely accept its expected flow. Here is why the delay spreads far beyond that airport.
Tasmania's electric-blue surf can come from billions of Noctiluca cells. A wave presses a microscopic chemical switch, but the blooms cannot be scheduled.
Nepal's double-pennant flag follows a precise constitutional construction. Its shape preserves a South Asian flag tradition that most countries replaced.