For a brief moment, Google News' top story was "Romney Drops Out of Race, Endorses Santorum." This is decidedly untrue — but hey, it was published by Forbes, so it must be worth something, right? Nowhere did it say this was a prank: although it should be obvious to most, we live in a country where actual people believe Onion headlines. And it's not as though this is that much more ridiculous than the Republican primary has been thus far.
The story has since been removed from the Google News page entirely.