Introducing Time

hanks to general relativity, the science of spacetime, we can now rigorously investigate questions about time travel, branching time, and so on.

That is, we may receive the answer before we even ask the question…
In much the same way as we encountered when discussing time travel.

The event corresponding to what you will do after you read this sentence does not exist. The future is unsettled and ripe with possibility.

Time is independent of the contents of the universe.

1999, the National Institute of Standards and Technology in Boulder, Colorado (US) started using an atomic clock known as the NIST F-1 to define the second.

sorry state, for I do not even know what I do not know!”.

such as whether the past and future are real, whether time travel is possible, and the explanation of the direction of time

IS THE CORRECT CONCLUSION THAT TIME DOESN’T EXIST? OR IS IT ONLY THAT TIME AS WE MIGHT WANT TO UNDERSTAND IT DOESN’T EXIST?

Finally, there are those like the English physicist Julian Barbour (b. 1937) who think that this theory helps spell the end for time. He believes that the formalism is telling us something deep – namely, that time doesn’t exist

QUANTUM GRAVITY IS THE NAME GIVEN TO THE THEORY… …THAT WILL RECONCILE THIS CONFLICT ALTHOUGH NO SUCH THEORY CURRENTLY EXISTS, THERE ARE A FEW MORE OR LESS DEVELOPED RESEARCH PROGRAMMES
Two major approaches are superstring theory and canonical quantum gravity. We cannot explain the details here, but we can sketch the problem known as the “problem of time” that plagues the standard, or “canonical”