I'm not sure if it's a giant joint or a turd. If it's a doobie I think that means they're cool. If it's a turd, they might not want to be our friend. Astronomers from Harvard have suggested a mysterious cigar-shaped object spotted last year may have been an alien probe sent to check us out. First they thought it was a comet and then an asteroid, and then they called it a new class of interstellar objects.