“If time travel is possible, where are the tourists from the future?”
Stephen Hawking
Stephen Hawking
Theoretical physicist

Quotes on life, love, and space:

We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very special.
It surprises me how disinterested we are today about things like physics, space, the universe and philosophy of our existence, our purpose, our final destination. It’s a crazy world out there. Be curious.
Quiet people have the loudest minds.
Life would be tragic if it weren’t funny.
Intelligence is the ability to adapt to change.
I think computer viruses should count as life…I think it says something about human nature that the only form of life we have created so far is purely destructive. We’ve created life in our own image.
Although I cannot move and I have to speak through a computer, in my mind I am free.
The downside of my celebrity is that I cannot go anywhere in the world without being recognized. It is not enough for me to wear dark sunglasses and a wig. The wheelchair gives me away.
One of the basic rules of the universe is that nothing is perfect. Perfection simply doesn’t exist…Without imperfection, neither you nor I would exist.
I don’t think the human race will survive the next thousand years, unless we spread into space.

“People won’t have time for you if you are always angry or complaining.”

Quotes on universe:

So Einstein was wrong when he said, ‘God does not play dice.’ Consideration of black holes suggests, not only that God does play dice, but that he sometimes confuses us by throwing them where they can’t be seen.
You cannot understand the glories of the universe without believing there is some Supreme Power behind it.
To confine our attention to terrestrial matters would be to limit the human spirit.
It matters if you just don’t give up.
Government works best under the glare of public scrutiny. Absent such scrutiny, abuses occur.
Time and space are finite in extent, but they don’t have any boundary or edge. They would be like the surface of the earth, but with two more dimensions.
One is always a long way from solving a problem until one actually has the answer.
It is not clear that intelligence has any long-term survival value.
We each exist for but a short time, and in that time explore but a small part of the whole universe.
Nothing is better than reading and gaining more and more knowledge.



Stephen Hawking was an English cosmologist, theoretical physicist and author. At the time of his death, he was director of research at the Centre for Theoretical Cosmology at the University of Cambridge.

Hawking made the theoretical prediction that black holes emit radiation, often called Hawking radiation. Hawking was the first person to use a union of the general theory of relativity and quantum mechanics to explain a theory of cosmology.

Hawking has written many popular science books in which he discusses his theories and cosmology in general. Hawking’s A Brief History of Time appeared on the Sunday Times bestseller list for 237 weeks, which is a record.

Hawking appeared in an episode of Star Trek: The Next Generation in 1993. He also made an appearance on The Simpsons in 1999 and had a recurring role in The Big Bang Theory. He has also appeared in many documentaries, including The Real Stephen Hawking (2001), Stephen Hawking: Profile (2002) and Hawking (2013). The Theory of Everything, a Hollywood film released in 2014, was based on Hawking’s life.

Hawking was ranked number 25 in the BBC’s poll of the 100 Greatest Britons in 2002. He received the Presidential Medal of Freedom in 2009.