Stephen Hawking

Success in creating AI would be the biggest event in human history. Unfortunately, it might also be the last, unless we learn how to avoid the risks.

As scientists, we step on the shoulders of science, building on the work that has come before us - aiming to inspire a new generation of young scientists to continue once we are gone.

Many badly needed goals, like fusion and cancer cure, would be achieved much sooner if we invested more.

Computers double their performance every month.

We think that life develops spontaneously on Earth, so it must be possible for life to develop on suitable planets elsewhere in the universe. But we don't know the probability that a planet develops life.

I believe alien life is quite common in the universe, although intelligent life is less so. Some say it has yet to appear on planet Earth.

For years, my early work with Roger Penrose seemed to be a disaster for science. It showed that the universe must have begun with a singularity, if Einstein's general theory of relativity is correct. That appeared to indicate that science could not predict how the universe would begin.

God may exist, but science can explain the universe without the need for a creator.

There is nothing bigger or older than the universe.

I believe there are no questions that science can't answer about a physical universe.

If you understand the universe, you control it, in a way.

A zero-gravity flight is a first step toward space travel.