Sleestak Rhapsody

At first I thought that Deep Impact, the Nasa probe that will slam into the Tempel 1 comet in order to gain insights, scientists believe, into the origins of our solar system, was an amazingly cool thing. I still do, of course, but I have a vague recollection that this was the kind of thing that caused the Sleestaks to fall from a race of intelligent, cultured reptilians to bow and arrow wielding primitives who were afraid of fire.

(Actually, this particular portion of the Land of the Lost show sounds remarkably like portions of the Book of Mormon.)