We're going to need a definitive quantum theory of gravity, which is part of a grand unified theory - it's the main missing piece.

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• Kip Thorne:

  We have to have a combination of general relativity that describes the warping of space and time, a

• Kip Thorne:

  'Closed timelike curve' is the jargon for time travel. It means you go out, come back and meet your

• Kip Thorne:

  Whether you can go back in time is held in the grip of the law of quantum gravity.

• Kip Thorne:

  Sending people into space is very important culturally. That's really the justification. You cannot

• Kip Thorne:

  The human race has a yearning to explore. That's part of our biological and psychological makeup.

• Kip Thorne:

  A big misconception is that a black hole is made of matter that has just been compacted to a very s

• Kip Thorne:

  A black hole really is an object with very rich structure, just like Earth has a rich structure of

• Kip Thorne:

  Gravitational waves will bring us exquisitely accurate maps of black holes - maps of their space-ti

• Kip Thorne:

  When gravitational waves reach the earth, the waves stretch and squeeze space. This is a tiny stret

• Kip Thorne:

  As early as I can remember, I wanted to be a snowplow driver. When you grow up in the Rocky Mountai