In big lines, entropy can be defined as a measure of disorder of a system. However, nobody can give more details about its nature, as there have been so many definitions of the term throughout the years. All these definitions vary according to the discipline the term is used for.
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The second law of thermodynamics, the so-called 'the entropy law', it is said to be one of the most important laws in nature. This law states that entropy, which is a measure of disorder in a closed system, almost always increases in time.
The entropy law, or the second law of thermodynamics, has as object of study the disorder within a system. The bigger the system and the more the molecules and atoms within, the more the entropy contained.
Murphy's Law states that if anything can go wrong, it will go wrong.
Entropy explains why Murphy's Law is so prevalent in life. Life can go wrong in more ways than it can go right. What is remarkable is not that life has problems, but that we have the ability to solve them.
Various experiments and studies on diverse subjects like bird migration and green plants show signs of natural quantum-level effects in nature, including our brain and cells.
Certain molecules called ‘Posner molecules’ can resist the decoherence for a short while, influencing how the brain works at a quantum level.
Symmetry, as it is understood, seems not to answer the biggest questions in physics. In some cases, symmetries show the underlying laws of nature that do not show up in reality.
For example, when energy congeals into matter (E = mc2), the result is an equal amount of matter and antimatter - a symmetry. Yet if the energy of the Big Bang created both matter and antimatter equally, they should have destroyed each other, leaving nothing behind.