"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Here’s what you’ll learn when you read this story: The Busy Beaver number, or BB(n), represents a ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Here’s what you’ll learn when you read this story: The Busy Beaver number, or BB(n), represents a ...

From China and the US to India and Russia, here are the 25 largest militaries in the world, ranked by the number of active-duty armed forces.

KYIV, Ukraine (AP) — Ukraine says Russia launched the biggest number of drones in the 3-year war on Sunday.