At the moment, humanity does not know how to move into the past. Even if such a concept exists, it makes no sense. But what if you are an astrophysicist and want to find evidence of time travelers? You can, for example, search for them on Twitter, as did Professor Robert Nemeroff and graduate student Theresa Wilson.
Traveling through time into the future is a fact that we make every day. Accelerated travel to the future is also possible - for example, with the help of fast planes. The situation with travel to the past is much more complicated. It would seem that modern physics does not prohibit doing this in any way, but no one has yet succeeded in solving this problem.
Since relatively recently, scientists have begun to make attempts to contact people who have come to our time from the future. In 2005, a graduate student at the Massachusetts Institute of Technology held a Time Traveler Convention. Despite the publicity of the event, not a single person from the future showed up. In 2012, Stephen Hawking also hosted a time traveler party, sending out invitations after the party. But this time no one came either.
In the photo - a man, obviously not dressed for his time
Undoubtedly, one of the main differences between travelers from the future is their knowledge of something that has not yet happened in our time. This is what inspired Nemeroff and Wilson to search the Internet for such people. For example, using the phrases “President Obama” before 2006 or “comet ISON” before September 21, 2012 (when it was discovered).
Scientists have had difficulty with most search engines because of the required search timeframe. After exploring the possibilities of a number of search engines and social media, the researchers settled on Twitter. After analyzing roughly a trillion tweets, no evidence of time travelers was ever found.
This attempt at first glance may seem rather stupid, but upon a more thoughtful study it seems quite reasonable that people from the future could make a reservation and leave traces of their presence in the blogosphere. Unfortunately, however, there were no such traces, at least on Twitter.