If time travel is possible, where are the tourists from the future?

However difficult life may seem, there is always something you can do and succeed at.

It's the gravity that shapes the large scale structure of the universe, even though it is the weakest of four categories of forces

One can't prove that God doesn't exist. But science makes God unnecessary. The laws of physics can explain the universe without the need for a creator.

My first popular book, 'A Brief History of Time,' aroused a great deal of interest, but many found it difficult to understand.

I have to speak through a computer... in my mind, I am free. Free to explore the universe and ask the big questions...

It is a waste of time to be angry about my disability. One has to get on with life and I haven't done badly. People won't have time for you if you are always angry or complaining.