
Figuring out Time Machine speeds reminded me about my all time favorite temporal anomalies and paradoxes. For those of you unfamiliar with Star Trek or comic books or science fiction of any kind, a temporal anomaly is any sort of change a time traveler causes in his or her many wacky time travel adventures. It’s the butterfly effect, where a butterfly’s wings in the past cause this thing to happen that cause this other thing to happen and so on and so on until Toaster Strudels were never invented. A temporal paradox is a temporal anomaly which causes the time traveler to never go back in time to create the temporal anomaly that made him never go back in time. Huh? This is how perfectly good universes are ruined.
Back to the Future II for example has my all time favorite paradox. To avoid spoilers, I suggest if you’ve never seen Back to the Future II to leave this website and never return. Go on… I’m not kidding… hit the back button, it’s in the upper left corner there.
The original Back to the Future was about Marty McFly trying to stop a paradox from happening, i.e. changing the past to prevent his birth and consequently never going back in time to change the past that prevented his birth. Back to the Future II, however, throws out all pretense of temporal anomalies in favor of hover boards. Robert Zemeckis and Steven Spielberg don’t want you to look at the plot, they want you to look at hover boards. Look there’s a hover board. Don’t look at the temporal paradox. Four hover boards and a baseball bat! Don’t look at the paradox. But we all looked at the paradox, even as a young boy I knew something just wasn’t right.
Old Biff stole the DeLorean and gave young Biff the Gray’s Sports Almanac from the future, which created an alternate timeline. Doc and Marty travel back to alternate 1985 and wackiness ensues (gambling and fires and shotguns, oh my). They then travel further back in time to prevent all this from happening. The problem is the timeline veers the moment old Biff gives young Biff the sports almanac meaning old Biff could never travel back to his original timeline to conveniently drop off the time machine for Doc and Marty to travel back in time in. Old Biff would travel to a future 2015 where he was a millionaire and Hill Valley was in ruins. Furthermore, alternate Biff muddied the timeline enough to prevent time travel from being invented and Doc Brown and Marty from ever meeting: Doc was in an insane asylum and Marty was sent to private school.
Old Biff should have given young Biff the almanac and then the universe should have imploded, where old Biff and young Biff float in a white void of nothingness calling each other “Butt Head” for rest of eternity.

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