Because they’re out of a job. There are no UFO’s, it’s all in people’s heads.
Check out this staircase/bridge. Pretty nifty.
I wanted to mention this last week when it first circulated around the web, but Astronomy Picture of the Day prompted me to remember. Check out this spectacular movie of Huygens’ descent through the orange haze of Titan in January 2005; the first views of an alien world. Amazing.
Another good site on this historic event is the NOVA web site, Voyage to the Mystery Moon.