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When we look around us, we see a three-dimensional world: objects are made up of the three usual spatial dimensions. Although we all know...

We are currently witnessing a fascinating competition between theory and experiment regarding dark energy: general relativity and...

Over the years, the articles on this website have become increasingly in-depth and complex, so that understanding many of them...

One of the most amazing things in this world is that human beings (a species of large-brained hominids) are capable of studying phenomena...

Schwarzschild geometry was the first exact solution to Einstein's equations of general relativity. As is well known, this solution...

The theory of general relativity forever changed our way of viewing the Universe around us: space and time are part of a dynamic,...

In 2010, just before the first collisions at the LHC, the experimental expectations of the particle physics community were impressive....

The title of this post is seemingly puzzling: How can we even attempt to describe what happens inside a black hole? Although it may seem...

"The macroscopic geometry of relativity has many special features. Features that suggest a hidden complex-manifold origin and certain...

Human beings are capable of achieving things that at first seem completely beyond their reach. While extraordinary people like Magellan...

Physical reality is that which can be detected with any measuring device that can be physically constructed. However, in the...

The great Albert Einstein imagined himself "riding on the back of a ray of light." Einstein realized that traveling at the speed of...

"It's not that the Universe is stranger than we imagine, it's that it's stranger than we can imagine." Werner Heisenberg Probably the...

Our standard cosmological model includes a very brief period of exponential expansion called cosmic inflation, which ended with the Big...

Until very recently it was thought that detecting low-energy phenomena derived from The quantum nature of space-time was impossible to...

On November 30, 2022, a group of physicists led by Maria Spiropulu published a surprising study in the journal Nature that caused a great...

In 1997, physicist John Preskill bet the great Stephen Hawking and the renowned physicist Kip Thorn that information was not destroyed in...

In 2019, the EHT (Event Horizon Telescopy) experiment showed the world the first "image" of a black hole. Physicists knew that the image...

The so-called "Planck scale" marks a fundamental limit beyond which the physical world as we know it ceases to make sense. In fact, it is...

The physics of the Universe, at a fundamental scale, is so different from our macroscopic world that it seems like science fiction. In...

Gravity is a special force. Unlike the other fundamental forces, it does not exist within a specific space-time; rather, gravity is the...

"The infinity of the Universe is a great blessing for human beings, because human beings' desire for discovery is also infinite!" Mehmet...

On December 14, 1922, Albert Einstein gave a lecture at Kyoto University in which he stated: "The key that led me to formulate the theory...

Recently, at a fundamental physics conference, one of the fathers of string theory, the great physicist Leonard Susskind, was asked to...

Currently, superstring theory (SST) is our best candidate for solving the biggest problem in fundamental physics: merging quantum...

The everyday world we observe around us is only a tiny fraction of the physical reality our Universe offers us. In fact, it seems...

Many of the articles on this blog describe fundamental physics phenomena that may seem too abstract or complex for a general audience. In...

Cosmological measurements of the expansion of the Universe and dark energy One of the most important and far-reaching cosmological...

In the previous article, we saw how entanglement entropy (EE) measures the number of entangled microstates (qubits) between two systems....

In recent years, a series of theoretical studies have appeared that include very important advances toward resolving one of the deepest...

Modern physics is replete with physical and mathematical concepts and phenomena so alien to our everyday experience that they seem to...

In addition to the best-known and most studied phenomena, the Standard Model of particle physics includes some rather more "exotic" and...

In the previous article, we saw how practically everything we know about particle physics and fundamental forces revolves around the...

Although most people are not fully aware of it, there is a truly amazing world out there. At a fundamental level, the Universe is...

The Universe we inhabit is full of fascinating and "exotic" objects and phenomena. Some, such as black holes and quantum entanglement,...

In 1931, the great physicist Paul Dirac published an article that would have a huge impact on the scientific community. On the one hand,...

Many people consider the concept of the Multiverse to be exotic and far from reality. The original Big Bang model probably has a lot to...

Until very recently, fundamental questions such as the creation of the Universe or the ultimate nature of space and time belonged to the...

Time is undoubtedly the strangest and most intriguing of physical quantities. While spatial variables can, in principle, take any value,...

In the first part we saw that, theoretically, a hypothetical superluminal tachyon would allow information to be sent to the past, which...

In these two articles, we will attempt to answer in detail the now-famous question: Do the laws of physics allow time travel? We will...

One of the greatest conceptual shifts in human history is the discovery that space is not a fixed, unchanging "stage" where things...

Black holes (BL) are, by far, the strangest and most fascinating real physical objects in the Universe. The laws of physics predict that...

Black holes (BL) are, by far, the strangest and most fascinating real physical objects in the Universe. The laws of physics predict that...

When we hear about the Big Bang theory, we always ask ourselves the same question: What was there before the big bang? How could our vast...

We have been living in what we can consider modern civilizations for just over two centuries. In this very short period of time, humanity...

All known matter is made up of particles called fermions (electrons and quarks). On a macroscopic scale, we see well-defined solid...

In the previous article, we looked at four "clues" about the mysterious nature of time. In this article, we will discuss the last and...

Our understanding of the true nature of time has barely advanced since Einstein merged space and time into a single, four-dimensional...

The so-called (super)string theory (SST) is a theoretical framework based on physics and mathematics that constitutes our best candidate...