Book: The shortest history of time

the question about the possibility of time travel remains open. But we don't advise you to keep this question bet in case your opponent is cheating, knowing the future in advance?

If, indeed, there is no comprehensive physical theory that governs everything, then it must be assumed that it determines our actions. However, it makes it so that its consequences cannot be predicability for such a complex organism as a human being, and, in addition, it includes a certain element of randomness, the corresponding quantum mechanical effects. This allows us to say that our statements about human free will stem from the impossibility to predict what he will do. However, if a person will fly on a space ship and return before I ever went, we could predict that he or she will do it, because it will be part of recorded history. Thus, in this situation, the time traveler would not have free will in any sense.

due to wave-particle duality in quantum mechanics of light in some cases behaves like a wave, and the other definitely exhibits the properties of a particle. The concept of "wave" and "particle" is just a manmade concept, and nature is not obliged to follow them, adjusting all phenomena under a particular abstract category.

if a particle and an antiparticle meet, they mutually annihilate. So if you happen to meet my anti-me, not share with him the handshake! You both disappear in a blinding flash of light.

With the development of new technologies and the emergence of an excellent space telescopes, we began to learn about the Universe amazing things. And here's the good news: we now know that the universe will continue in the near future to expand with ever-increasing speed, and the time promises to last forever, at least for those who have the good sense not to fall into a black hole.

since the dawn of civilization, people have refused to consider the phenomenon devoid of interactions and inexplicable. They wanted to understand the underlying world order. Today we still want to know where and how we came to this world. The fundamental thrust of humanity to the knowledge - sufficient reason to continue the search. And we will not udovolstviem less than full comprehension of the Universe in which we live.