Time travel is tricky business. Scientists seem to always be wringing their hands over the potential implications of time travel. That is, if you believe the movies, and The Onion News Network's analysis of Mitt Romney's scheme to eliminate any versions of himself that sound too liberal, preventing the conservative vote!
SciAm Blogs makes our pop culture debut at about 1:57!
It's official, Scientific American Blogs are cool!
(This is not the first time that The Onion has approached the subject of scifi travel. You might enjoy this piece, "I Don't Define Myself by my Ability to Travel Between Dimensions")