Are UFO real Are aliens real Where do they come from in the galaxy?

Are UFOs real are aliens real where do they come from in the galaxy and is it true? is they existed before us and have advanced inventions that surpass their time they know how to travel in time they go to this planet and another planet in just a few days. Humans are in danger of extinction do we have the level to reach the stars and find life on new planets and planets like the earth that we call home. 

Some theories suggest that aliens are from the future and know the origin of humans and know where we came from in the galaxy. 

An example is that if our planet is destroyed, the only technology that helps humans survive the danger is spaceships and other symbolic and imaginary technologies that represent the hypothesis that humans will actually exist 425 years from now, the "recession period" that is, the earth's magnetic field is reversed and is in decline.