Life on Earth is at the ever-increasing risk of being wiped out by a disaster, such as sudden global warming, nuclear war, a genetically engineered virus or other dangers. I think the human race has no future if it doesn't go into space. I therefore want to encourage public interest in space.

Children in backseats cause accidents. Accidents in backseats cause children.

There is a fundamental difference between religion, which is based on authority, [and] science, which is based on observation and reason. Science will win because it works.

I used to think information was destroyed in black hole. This was my biggest blunder, or at least my biggest blunder in science.

The development of full artificial intelligence could spell the end of the human race.

The media need superheroes in science just as in every sphere of life, but there is really a continuous range of abilities with no clear dividing line.

I’m the archetype of a disabled genius, or should I say a physically challenged genius, to be politically correct. At least I’m obviously physically challenged. Whether I’m a genius is more open to doubt.