When two friends meet... after one has lived in the mountai… - Carlo Rovelli

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When two friends meet... after one has lived in the mountains and the other at sea level, the watches... will show different times. ...Neither is truer than the other. ...Times are legion: a different one for every point in space. ...there is a vast multitude of them. ...Every clock has its proper time. ...Einstein has shown how to calculate the difference... The world is not like a platoon advancing at the pace of a single commander. It is a network of events affecting each other. ...Physics does not describe how things evolve "in time" but how things evolve in their own times, and how "times" evolve relative to each other.
Time has lost... its unity.

Carlo Rovelli

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About Carlo Rovelli

Carlo Rovelli (born May 3, 1956) is an Italian physicist and cosmologist working in the field of quantum gravity. In 1988, Carlo Rovelli, Lee Smolin and Abhay Ashtekar introduced a theory of quantum gravity denoted loop quantum gravity.

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Lee Smolin Julian Barbour Gerald James Whitrow Arthur Eddington Tim Maudlin

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If we formulate the fundamental theory of nature in a timeless language, we have then the problem of recovering the familiar notion of time.

If we had a starship, we could move near a black hole, stay there for a half hour and then come out. Outside hundreds of years could have gone. So we could... come away from the black hole into the far future easily.

[T]ime is much more elastic than our intuition of this rigid passage... The time interval between one point and another... depends on where you are.

When two friends meet... after one has lived in the mountains and the other at sea level, the watches... will show different times. ...Neither is tru… - Carlo Rovelli

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