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.

Next quotes

• Stephen Hawking:

  It's time to commit to finding the answer, to search for life beyond Earth. Mankind has a deep need

• Stephen Hawking:

  Science predicts that many different kinds of universe will be spontaneously created out of nothing

• Stephen Hawking:

  Philosophers have not kept up with modern developments in science. Particularly physics.

• Stephen Hawking:

  Scientists have become the bearers of the torch of discovery in our quest for knowledge.

• Stephen Hawking:

  Time travel used to be thought of as just science fiction, but Einstein's general theory of relativ

• Stephen Hawking:

  Science is not only a disciple of reason but, also, one of romance and passion.

• Stephen Hawking:

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

• Stephen Hawking:

  In the past, there was active discrimination against women in science. That has now gone, and altho

• Stephen Hawking:

  Science is beautiful when it makes simple explanations of phenomena or connections between differen

• Stephen Hawking:

  I believe the universe is governed by the laws of science. The laws may have been decreed by God, b