Notifier/sutsu
Reference: time stamp is the total number of milliseconds from 1 january 1970 (08:00 gmt) to the current time. It is also known as unix timestamp. The time of the computer has been unified since 1 january 1970。
The only time stamp that cannot be forged is the most important indicator used to judge information and is legally efficient. Will there be a time stamp from the future
Every person's life is sad, and if you're a computer gamer, maybe you're always hoping that life will be like a computer game, "read the progress," and let it stop. If you ask physicists, can life read progress? Maybe he'll tell you it depends on whether time travel is possible。
Is time travel possible? The issue was studied by physicists based on known physical patterns, and the preliminary results are not encouraging, but they are not yet conclusive. Now that we're not sure yet, there's a possibility, so some physicists are looking at it from another angle, which is, if time travel is possible, do we have time travelers around? Stephen hawking, a british physicist, asked the question in a brief history of time, and he suggested that a negative answer to the question might mean that it was impossible to return to the time travel of the past — the emphasis being on “go back to the past” because time travel is clearly not possible at this time, so time travelers can only come from the future, and to us is going back to the past。
In order to test whether there are any time travelers around us, hawking has also done an interesting experiment: he wrote an invitation to time travelers to come to a party at a given point in time at cambridge university. He also arranged for the news to be released after the appointed time, to ensure that no ordinary person could pretend to travel in advance of the news, and that the invitation was placed in a place that could be kept for a long time, so that travelers could find it for a long time to come。
As a result, no one came to hawking's party。
But physicists don't give up. In 2013, the physicist robert j. Nemiroff of the michigan polytechnic university in the united states, among others, thought of another move: searching for time travelers on the internet. What information can be considered from time travelers? Namirov and others think there is a "prescient" message. Specifically, they considered two types of information: information referring to the "comet ison" (ison comet) before september 2012; and information referring to the "pop francis" before march 2013. In both cases, the time frame was chosen before the term in question was introduced, so the reference to those terms might be “preliminary” for time travelers. Other factors are taken into account in the selection of these two types of information: for example, the terms involved are unique (which can reduce coincidences) and are more important (which can increase the likelihood that they are known to time travelers - but the "comet ison" is, in my opinion, less than adequate。
As for the search tools, namirov et al. Rely on the time-ordered search function of twitter, as well as the search function of google and facebook, which are somewhat flawed for their purposes. In addition, they used google trends, a search tool for the search terms themselves, to check if anyone had made a priori search for those terms。
The result of the search was like hawking's party: nothing。
Although the search failed, the search was easier than the other means, so it might be emulated. However, the credibility of such searches is questionable. One of japan's reasoning writers in my novels, one of the criminals posted information online before a number of accidents. According to namirov et al, that information is likely to be seen as "preliminary" for time travelers. And in fact, one of the links in the criminals' methods is to publish a lot of similar information to make sure that some of them are right. In a search by namirov and others, there will naturally be no criminals, but there are so many people who publish so much information every day, even in more unique terms, that the possibility of occurrence cannot be ignored. In fact, namirov and others have come across a case, which was simply abandoned for being too vague. Moreover, the omission of this type of search is very large, because there are thousands of important terms. Time travelers happen to have very little chance of mentioning the chosen terminology。
And even more, if time travelers really come around us and have the ability and the will to show their foresight, will they use the pediatric technique of mentioning one or two terms? I doubt it. I remember a science fiction novel that i read many years ago: a ship from an advanced civilization was lost to a crew member, and the mystery of the disappearance was finally discovered, and the crew member was fortunate to be on earth, whose name is einstein
Perhaps, the meaning of the science fiction is more practical, because the technology of the future is the surest precursor, and if time travelers don't grudgingly show their vision, he (she) may well become a big figure like einstein, not a few vague terms online。
The proponent's conclusion: according to einstein's relativity, we have only the possibility of moving forward through time, without the possibility of going backwards. Back to the past may be a big dream。
