Have you heard?

and Did you hear?

a question used to introduce a piece of news or gossip. Sally: Hi, Mary. Mary: Hi. Have you heard about Tom and Sue? Sally: No, what happened? Mary: I'll let one of them tell you. Sally: Oh, come on! Tell me! Bob: Hi, Tom. What's new? Tom: Did you hear that they're raising taxes again? Bob: That's not new.