Hawking once again said that the human earth space is about to run out. Will interstellar travel and immigration begin in the future?

If human beings want to live forever, the most basic requirement is to ensure a large enough human base and make the worst plans for any unexpected situation that may be encountered in the future. Compared with the whole universe, the earth is just a drop of water in the ocean, and its resources and land are limited. Therefore, it is an indispensable stage for human beings to explore outer space and establish living quarters in the future, but this expectation seems a little far away because of the underdeveloped technology in contemporary times.

In order to carry out interstellar migration in the future, human beings must develop efficient power devices to ensure sufficient speed and minimum fuel consumption. It is found that the planet suitable for human habitation is about 2~3 light years away from the earth. According to the existing scientific and technological level of the earth, it takes thousands or even tens of thousands of years to reach that planet, and it is meaningless to die before reaching the immigrant planet. You can also use enough energy to distort space to make small wormholes, and it seems to be a better choice to directly establish a short-distance channel between the two planets. Or perhaps, like the animation "Time and Space Fortress", we can send several long-distance immigrant groups with hundreds of thousands or even millions of people to sail aimlessly, and each immigrant group is similar to a separate circulatory system to ensure the normal life activities of the insiders. During the voyage, they may come into contact with aliens with highly developed civilization. If they are willing, they may make a qualitative leap in the scientific and technological level of the earth and greatly shorten the time for the entire human world to evolve into a more advanced civilization.