Hawking's three major predictions are:

1. In 2032, the global climate will change. The current natural environment is indeed not optimistic enough.

2. Before 2060, people on earth will take a big step towards the starry sky. In other words, manned space technology will be fully mature. At present, it is very likely to be realized.

3. That is, in 2100, a new race of humans will appear. If manned spaceflight technology matures and some people go to live in space, it is indeed possible that a new race of humans will be born.

Hawking's "gray hole" theory:

It is believed that matter and energy will be released into the universe again after being trapped by a black hole for a period of time. He admitted in his paper that his initial understanding of the horizon was flawed and that light could actually pass through the horizon. As light escapes the core of a black hole, it moves like a person running on a treadmill, slowly shrinking by radiating outward.

Classical black hole theory believes that no matter and radiation can escape from a black hole, while quantum mechanics theory shows that energy and information can escape from a black hole. Hawking also pointed out that explaining this escape process requires a theory that can successfully integrate gravity and other fundamental forces. For nearly a hundred years, no one in physics had tried to explain this process.