happened upon

Though the creature had already been described by science, researchers lacked significant specimens to inspect until Darwin happened upon a Megatherium skull.

“Just a little further,” I kept telling myself, and then we happened upon it.

At the start of Thursday's evidence session, Mr Goddard said to him: "Your account is, this is somewhere you just happened upon in your van with a sex worker from Glasgow?"

A neighbor accompanied by a 3-year-old happened upon firefighters replenishing the engine’s water tank from a hydrant.

Taylor happened upon Einstein as he was walking down a hill.