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Stephen Hawking: Questioning the universe

Stephen Hawking is  the former Lucasian Professor of Mathematics at the University of Cambridge and author of A Brief History of Time .I have seen and read his researches online and I liked how the way he thinks and although his disability and he continued , which proves that the older or the disability is a state of mind. He asked some Big Questions about our universe, How did the universe begin? How did life begin? Are we alone?Is there alien life out there? What is the future of the human race?. he said that there is nothing older or bigger than the universe, and the universe is changing in time and separating.  He also discussed the big bang and what is before the big bang . Have you ever thought which came first the chicken or the egg?? . and he said The universe can spontaneously create itself out of nothing. if we were the only intelligent being in the galaxy we should make sure that we survive . if we want to continue beyond the next hundred years, our future is in space. In conclusion, the universe is easy we just have to understand it ,because the world have not   changed . we are changing the world , destroying , cutting , burning, and digging in the earth because of greed .