Article: Ten Phenomena That the Scientific Community Can't Explain

Ten Phenomena That the Scientific Community Can't Explain contains probably the usual and expected items. Among the categories: UFOs. Science can't explain them, and no one else can either.

In popular culture, the concept of UFO is usually taken to mean a spaceship flown by aliens.

I'm not so sure it's fair to put it all on "popular culture" while ignoring the fact that the pathological mega skeptic crowd has latched onto the false idea that UFOs translates to little green men from space. By using this tactic -- "Everyone knows that when someone (anyone but them that is) talks about UFOs, they mean aliens" -- the discussion ensures that authentic investigation into UFOs never happens. (thanks to Lesley at The Debris Field for link.)