All aboard the gossip train

I always knew gossip spread pretty fast in my department but I don't think I truly realized how fast until today. My supervisor gave his resignation yesterday and by noon today I had two people say to me, "So I hear he resigned". The thing is that you would have had to be living under a rock to not realize he was going to resign so I don't understand why this is such big news. I've always wanted to start some departmental gossip and see how fast it spread but now I don't have to. Apparently half a day is enough.