How does the indeterminate world of quantum mechanics, where the future isn’t fixed, become the classical predictable real world we experience? Quantum researchers argue about it even today. It's really all...

In quantum mechanics, it’s just as natural to go forward in time as going backwards. And if you look at a typical Feynman diagram, you can turn the diagram either way. Where does this transition from time symmetry...

Why do certain elements have similar properties? Because of the way electrons are arranged around the nucleus of atoms. But why are electrons arranged specifically in certain orbitals and shells? The structure of...

The simplest definition of free will is the ability to have made a different choice. Our more precise definition: it is the ability of conscious beings to make choices that are not solely determined by prior physical...

The simulation hypothesis is the idea that everything we experience, including our memories and consciousness could be an advanced digital simulation created by a technologically advanced civilization. It's so advanced...

AdS/CFT suggests that our three-dimensional universe can be perfectly modeled by a two-dimensional surface. On one side is AdS, or Anti-de Sitter space, which is a kind of imaginary universe with some unusual properties...

The many worlds interpretation of quantum mechanics was put forth by graduate student Hugh Everett in 1957. It was considered preposterous at the time, but is now going mainstream. It requires us to...

We have 3D + 1D of time. Why aren’t there 4 dimensions or 2 dimensions? Can life exist in the 4th dimension? Is there something special about three dimensions that makes life possible? This is the question that But...

How the Planck scale is derived from the most important fundamental constants in physics. This is where our physics ends. If you wanted to simulate the universe in a computer, you would need to enter...

When the nucleus was discovered by Rutherford, it became clear the classical world was not reality, because according to classical electromagnetism, the electron should collapse to the proton. This problem was...

Does a final theory exist that can end our reductionist probing into ever shorter distances? Or is there no end to reductionism? There should be an end point because as the object of our measurement gets small...

In 1908, Dutch physicist Heike Onnes figured out how to turn helium gas to liquified helium for the first time. He cooled Mercury and found that all its electrical resistance went away. Electricity in a superconducting...

Quantum Immortality - is it real? Quantum mechanics shows that all particles are not particles at all but really waves of probabilities. There are two common interpretations of how these waves become distinct- one...

A quantum wormhole was created by a team of physicists led by Maria Spiropulu of CalTech. But this was not a wormhole in spacetime, but a quantum holographic wormhole created inside a quantum computer.



The...

How Does our Olfactory system work? How do we Smell? It turns out that quantum mechanics plays a big role. What you may not realize is that inside your nose rests a very sensitive quantum device that uses complex...

Holographic Universe? Are we living on a hologram? Or inside a black hole? Our perception is that we live in a three dimensional world. What if our three dimensions, can be equally represented on a two...

Physicists know how to use the equations of quantum mechanics to predict things, but don't really understand what is fundamentally going on.



The primary challenge is that according to the...

Summary:

In this video I explain what supersymmetry is, why physicists think it should exist, why we haven't discovered it, and why it is necess

ary.

There's a theoretical idea that could get...

SUMMARY

How is mass and energy the same thing? What is mass really? If you weigh 80kg and are in a car moving 100km/hr, your energy is equal to about 30000 joules. But did you know that the energy you have standing...

SUMMARY

The idea that there may be different versions of you comes from the concept of multiverses. There are many types of multiverses in physics. But at least two multiverse concepts based on generally accepted and...

SUMMARY

What if time is not real, but an illusion? Isaac Newton believed time was absolute and ticked at the same rate for everyone, everywhere. But Albert Einstein shattered that view with the theory of relativity....

The original paper by the authors who first performed the Delayed Choice Quantum Eraser implied retro causality. But retro causality is true only if you assume a classical way of thinking. But that's not the way quantum mechanics works.

SUMMARY

What if gravity repelled instead of attracted? Repulsive gravity may have shaped the entire history of our universe. For centuries gravity was defined by Isaac Newton’s Law of Universal Gravitation which...

Summary:

Everything you can see is made of up of the same fundamental particles. The best theory of fundamental particles and forces is the Standard model of particle physi

cs.

It’s really...