A couple links from the Top-40
They actually killed him off for good. Turns out they hated the mumbly little lemming. I thought he was hilarious, but good for Butters! ;-)
Boston Globe: Professor's time travel idea fires up the imagination
Hm. Time travel was always cute and interesting when it was sci-fi, but if it's for real (not saying I totally believe this guy but let's just imagine for a moment) this is very scary stuff. The ramifications are beyond distressing. What if someone changed something in the past that led to one or both of my children not being born for some reason? Damn.