Where Does Complexity Come From? (Big Picture Ep. 3/5)

TL;DR

The universe tends towards increasing entropy, but complex structures can still come into existence due to the difference between entropy and complexity.

Transcript

The universe as a whole evolves towards increasing entropy, or disorder -- a tendency physicists call the Second Law of Thermodynamics. This movement toward disorganization might lead you to think that organized structures – like, say, living beings – would never spontaneously come into existence. Of course entropy can go down in part of the univer... Read More

Key Insights

• ❓ The Second Law of Thermodynamics states that the universe tends towards disorder, but complex structures can still exist.
• 🌥️ Order and complexity are different concepts, with entropy measuring the number of arrangements of particles with the same properties and complexity measuring the difficulty in describing large-scale properties.
• 💗 Complexity initially grows and then decays as entropy increases.
• 🍼 The process of coffee and milk mixing can illustrate the relationship between entropy and complexity.
• 🔉 The current stage of the universe is characterized by medium entropy and complex structures.
• ❓ Complexity can be a natural step towards increasing entropy.
• 😘 The early and far future stages of the universe are both simple and have low entropy.

Questions & Answers

Q: Why do organized structures, like living beings, exist in a universe that tends towards disorder?

The existence of complex structures does not contradict the increase of entropy in the universe. Complexity is different from entropy, and while entropy increases, complexity can initially grow before eventually decreasing.

Q: How can the relationship between coffee and milk mixed in a cup explain the concepts of entropy and complexity?

The mixing of coffee and milk represents the increase in entropy. Initially, the system is simple and has low entropy, but as the coffee and milk blend together, entropy increases, while the system becomes more complex.

Q: What are some examples of complex structures in the medium-entropy stage of the universe?

Examples of complex structures in the medium-entropy stage include stars, galaxies, veins of minerals in rock, swirling clouds, amino acids, proteins, and living beings.

Q: Will complexity continue to increase indefinitely in the universe?

No, complexity in the universe will eventually decrease in the far distant future. The universe will reach a high-entropy state, which is simple and dilute, leading to the simplification of complex structures.

Summary & Key Takeaways

• The universe evolves towards increasing disorder, according to the Second Law of Thermodynamics.

• Order and complexity are different concepts, with complexity being a measure of how hard it is to describe a set of large-scale properties.

• While entropy increases in the universe, complexity initially grows, and then decays.