What We Don't Know

This episode I will explore quantum entanglement. Quantum entanglement is itself not unknown – many experiments have proven it a pillar of the quantum world – but it does herald interesting practical applications and theories in other aspects of physics. First I’ll give an introduction to quantum principles, then explain the basics of entanglement. I will talk about the Einstein-Podolsky-Rosen experiment and Bell’s inequality. There are many concepts to investigate: faster-than-light communication, applications in quantum computing, the stitching of space-time, and finally, entanglement through time. 

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This episode I’ll be exploring one of the greatest mysteries in physics: the incompatibility of general relativity and quantum mechanics. Einstein asserted that gravity is actually the effect caused by space-time curvature. It is very inconvenient that this theory of the very big cannot work with our theory for the very small, the quantum theories that explain how particles behave at the subatomic level. 

At the heart of physics nowadays is a quest to create a new theory of quantum gravity, one that explains our universe in the most accurate – and most satisfying – way. First I will talk about some of the science behind each theory, then how they fail together. Finally I’ll dive into some new ideas at the frontier.

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Today I’m talking about the origin of the nucleus. All cells have organelles, which are like the 
organs of a cell, specialised subunits that carry out specific tasks. The nucleus is a particularly 
important organelle because it houses all the genetic information of the cell.  Understanding how the nucleus came to be could unveil current mysteries surrounding the nucleus’ structure, function and why it sometimes goes wrong.

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Today we’re talking about the concept of silicon-based life. This is the idea that, instead of carbon being the only building block upon which life has flourished, somewhere in outer space there could be alien life using silicon in its molecular structure.

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