However difficult life may seem, there is always something you can do and succeed at.
Stephen HawkingThe development of full artificial intelligence could spell the end of the human race.
Stephen HawkingAlthough September 11 was horrible, it didn't threaten the survival of the human race, like nuclear weapons do.
Stephen HawkingLife 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.
Stephen Hawking