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Time can flow forward and backward from "summary" of Stephen Hawking's A Brief History of Time by Stephen Hawking
According to current understanding, time is a concept that is closely linked to the concept of entropy. Entropy is a measure of the disorder of a system. The second law of thermodynamics states that the total entropy of a closed system can never decrease over time, it can only stay the same or increase. This means that as time passes, the universe tends to move towards a state of increasing disorder. However, this idea of time flowing in a particular direction is not set in stone. In fact, some theories in physics suggest that time can flow both forward and backward. One such theory is the concept of imaginary time, proposed by the physicist Stephen Hawking. Imaginary time is a mathematical concept that is used in certain situations to describe the behavior of the universe. In imaginary time, the universe is described as a four-dimensional surface, where the three dimensions of space are joined with a fourth dimension of time. In this framework, time is treated as if it were a dimension of space, all...
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