Under the String

Core point one: strings. The "string" in string theory is the basic building block in theoretical physics, with a scale of about the Planck length (about one trillionth of the size of an atomic nucleus). At present, experiments have only detected the existence of strings, and have not fully grasped all their information. ‌ Core Point Two: The expansion of the universe. Cosmic expansion is a theory in astronomy that describes the continuous expansion of cosmic space. It refers to the phenomenon of galaxies moving away from each other due to the expansion of space itself. Its essence is derived from the general theory of relativity and has been confirmed by redshift observations and cosmic microwave background radiation. Core Point Three: Entropy. According to the second law of thermodynamics, entropy increase is irreversible in a closed system, that is, the degree of disorder (entropy value) of the system will continue to increase until it reaches the heat death state. However, humans can delay or partially reduce the impact of entropy increase through specific methods. The story starts from these three points and explains the world.