The unfolding of the universe from "summary" of Seven Brief Lessons on Physics by Carlo Rovelli
The universe is not a static thing; rather, it is continuously changing and unfolding. This unfolding process is driven by the fundamental laws of physics that govern the behavior of matter and energy in the cosmos. These laws dictate how particles interact with each other, how they move through space and time, and how they give rise to the structures we see in the universe. One of the key insights of modern physics is that the universe is not a collection of separate, independent objects, but rather a single, unified system in which everything is interconnected. This interconnectedness is captured by the concept of spacetime, which combines the familiar three dimensions of space with the fourth dimension of time into a single, four-dimensional framework. According to the theory of general relativity, developed by Albert Einstein, spacetime is not a fixed background against which events unfold, but rather a dynamic, flexible medium that can be warped and curved by the presence ...
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