Perhaps everything has external and internal aspects. The external properties are those that science can capture and describe — through interactions, in terms of relationships. The internal aspect is the intrinsic essence, it is the reality that is not expressible in the language of interactions and relations.
Lee Smolin is an American theoretical physicist. Smolin is best known for his contributions to quantum gravity theory, in particular the approach known as loop quantum gravity. He advocates that the two primary approaches to quantum gravity, loop quantum gravity and string theory, can be reconciled as different aspects of the same underlying theory.
Smolin is a faculty member at the Perimeter Institute for Theoretical Physics, an adjunct professor of physics at the University of Waterloo and a member of the graduate faculty of the philosophy department at the University of Toronto.
Books by Lee Smolin include:
- The Life of the Cosmos
- Three Roads To Quantum Gravity (Science Masters)
- The Theoretical Minimum: What You Need to Know to Start Doing Physics
- The Trouble With Physics: The Rise of String Theory, The Fall of a Science, and What Comes Next
- Time Reborn: From the Crisis in Physics to the Future of the Universe