Time and space are finite in extent, but they don't have any boundary …

Stephen Hawking
259 citations
Time and space are finite in extent, but they don't have any boundary or edge. They would be like the surface of the earth, but with two more dimensions. ✨ Stephen W. Hawking (1993). Black Holes and Baby Universes and Other Essays, Bantam
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A million million million million (1 with twenty-four zeros after it) miles, the size of the observable universe. ✨ Stephen W. Hawking (1990). A Brief History of Time: From the Big Bang to Black Hole … ▶
If time travel is possible, where are the tourists from the future?
If the total energy of the universe must always remain zero, and it costs energy to create a body, how can a whole universe be created from nothing?
The question is: is the way the universe began chosen by God for reasons we can't understand, or was it determined by a law of science? I believe the second. If you like, you can call the laws of sci … ▶
There are too many accidents that can befall life on a single planet. ✨ Colonies in space may be only hope, says Hawking. Interview with Roger Highfield, www.telegraph.co.uk. October 16, 2001.

Time and space are finite in extent, but they don't have any boundary or edge. They would be like the surface of the earth, but with two more dimensions. ✨ Stephen W. Hawking (1993). Black Holes and Baby Universes and Other Essays, Bantam

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