[ WP ] Traveling through parallel universes , you 've seen countless different outcomes , but have yet to see _______ live past the age of 2 . You finally reach a universe where you understand why ...

The breakthrough of multiverse travel allowed us to travel and see alternate histories of our planet. Of course, many universes did n't have an Earth due to some coincidence with its formation being too close or too far from the sun, and some never developed life, or at least not by the time we were able to scan it. So a great effort was undertaken by the worlds that have developed multiverse travel to classify the worlds by their similarities and the most logical way was to classify them based upon when the universe's local history began to diverge by more than 1 %, now deemed the Subramarian classification tree. 
 
 Very peculiarly, however, was how every universe that diverged near the end of the 19th century had a particularly brutal and widely reported murder. It goes under many names, but now we all call it the Hitler incident. The details are slightly different in every universe, but the key details are all the same. A young boy named Adolf Hitler is always found brutally murdered in his home on his second birthday. The only thing notable about his death was the seemingly arbitrary act and the particular brutality of the murder resulting in its wide reporting across the world at the time. 
 
 It seemed strange. The layman's understanding is incorrect. People says that anything can happen will happen resulting in the universe splitting. The work of Subramarian of course demonstrated the universes split at a constant rate, though of course not uniformly; another common misconception. But a single event with many divergences, beginning to happen before and after, seemed particularly strange. Especially with the fact that it is always reported on like clockwork on the 20th of April, 1891. 
 
 The Multiverse DNA scanners were developed after years of research for somewhat unrelated reasons. It was a project undertaken by my professor, hoping to use it to determine the likelihood of life developing on Earth and for the somewhat boring reasons of measuring the divergence of universes more accurately. It was only as an amusing side project my professor gave me to find a universe where the Hitler incident did not occur. At first, the scanners still found no trace of him. Like our multiverse ships could only travel to the present day of any Earth, our scanner could only scan the present day. So I had to look for traces of his decendents. Looking for people possessing 50 % of his DNA with a matching Y chromosome. I was able to find 10 universes. Exploring those universes it was clear that it was mostly a case of coincidental DNA matching between his brothers and the wives they happen to take. The Hitler incident still happened. What this meant was, he left no living direct decendents. 
 
 Finally, it was one of my more boring projects that allowed me to finally solve the mystery of the Hitler incident. I was tasked to quantify the relative changes in the various nationalities and races of people in order to explore if that was correlated with the branches of the current Subramarian tree. This of course would've allowed us to classify universe that have yet to develop multiverse technology and thus have n't had the ability to check in and give their full account. Those universes in particular were hard to classify at the time. But one particular anomaly occurred during my scans. One particular universe had a sudden decrease of millions of people of Jewish descent. At first we thought the instrument malfunctioned, but as far as we could tell, things were calibrated correctly. The project was deemed successful, because despite the one anomaly, it was still found that the relative racial populations do correlate well with the Subramarian classification. But that one anomaly still seemed strange. 
 
 Many theories were proposed, but after another year of measurement, it seemed the population of people of Jewish decent is still growing on that Earth. Therefore, only two reasons were left. Either that world had to either inexplicably start with much fewer Jewish people than all the other branches it was near, or there was a sudden decrease in the population of Jewish people. My best estimates put that number around 1 million sometime during the 20th century in order to produce the expected population decline. 
 Finally, it took some convincing, but eventually my professor to let me take a Multiverse ship to that world, and gather some information about the the anomalous data point. He gave me just enough funds for a single trip there and back. I powered my ship, and off I went. What I saw horrified me. Their world had experienced a second and particularly devastating second world war, during which roughly 6 million Jewish people of Europe were exterminated. The architect was non other than Adolf Hitler. I took the requisite multiverse data grabbed a few history books and proceeded to leave. 
 
 Many years later, I met a now good friend of mine, Dr. Hawthorne. We were talking about his latests work, a theoretical basis for time travel. He recently demonstrated how the energy required for bending spacetime to produce a backwars time curve can be computed based upon certain physical constants in each universe. What it meant was that most universes can time travel, though the energy required for initiating a time jump within a universe would be very large, and not easily generated even by our current standards in this universe, time travel is an inevitability in most universes. That gave me an idea. I pulled out my old results on the multiverse measurements of the anomalous multiverse, which we now classified as MVU-a001. What we discovered was both fascinating and troubling. According to Hawthorne's work, that universe exists at the singularity in his equations. Simply put, the universe's constants meant that the energy required for time travel is infinite. They could never time travel. 
 
 As you all know now, after many years of study by Dr. Hawthorne, he believes a grandfather paradox is most likely impossible. Again in layman's terms, you can go back, but your actions are already recorded in that universe's history: you ca n't change the past. What this means for MVU-a001 is simple. They could never time travel, so they never sent anyone to go back to kill their Hitler. In all our universes, upon seeing this universe, will eventually decide to go back and kill Hitler, and likely other big players in the second world war to prevent it and enter a golden age of scientific discovery. The particular timing of Hitler's death is the key feature. By making this one death so heinous and timed exactly to the day of his 2nd birthday, it would appear anomalous to enough people that some scientist in the multiverse will take not and eventually reach this conclusion. 
 
 We do n't know yet when each universe will develop the means to send one of their own backwards in time, nor do we know when each universe will finally decide to order one of their travelers to commit the unthinkable. But based on all our current understanding of the multiverse and the nature of time, it is inevitable that each universe of Earth's that diverges near the 20th century will send someone back to kill a baby and likely countless others upon closer examination of their histories in comparison to MVU-a001. And no dobut, other universes will begin looking at their own shared histories for strangely correlated events and undoubteldy, there will be other universes classified as anomalous. Unsurprisingly, detection of anomalous universes has become a hot area of research. 
 
 This is just one of the many strange discoveries that was discovered in my long career as a physicist. As you, the student, embark on your further studies of the multiverse and time, you will undoubtedly uncover more mysteries of your own. Tread carefully and I hope the mysteries you uncover and solve will lead to happier results. 
 
 Prof. Miranda Lopez 
 Forward to the book “ Multiverse and Time ”
