Search results for Alexander Vilenkin

On the BGV Theorem and Eternal Cyclic Cosmology

The beginning of the universe doesn’t need to be singular, so doubts about a singularity don’t need to translate into doubts about a beginning. Source

Квантовая гравитация: новый взгляд на теорию Большого взрыва

Основная задача любой науки — это ответить на вопросы, которые в конечном итоге пытаются пояснить, как работает окружающий нас мир. Одним из самых сложных и порой загадочных вопрос...

What If the Universe Had No Beginning? Part 1: A Wave Function for the Universe

The equations of general relativity give up at the singularity. Decades before Stephen Hawking dared to guess what came before, John Wheeler and Bryce DeWitt built the strange math...

Past-Eternal Loop Quantum Cosmology Gets the Bounce

Oscillating universes have been discussed in philosophy from time immemorial and in mathematical cosmology for over one hundred years. Source

Cracks Are Appearing in the Geometric Assumption Underlying All of Modern Cosmology

Feed the right numbers into the right formula and the universe should confess its geometry. That is the logic behind a class of tests cosmologists have been running for two decades...

Could the Universe’s Hidden Shape Solve One of Physics’ Biggest Mysteries?

A new study links the universe’s expansion to quantum topology, suggesting that hidden mathematical structures may stabilize the cosmological constant in ways previously unrecogniz...

Уравнения Эйнштейна помогли дать простое объяснение ускорению Вселенной

Источник: Компьютерра - Журнал о науке и технологиях Американские математики представили математическое доказательство того, что текущая модель расширяющейся Вселенной, основанная...

What If the Universe Had No Beginning? Part 3: A Universe From Nothing

Run Hawking's machinery and out pops something startling: the most likely universe looks an awful lot like ours, complete with inflation, a low-entropy beginning, and an arrow of t...

Taking dark energy out of the equation: Mathematicians challenge the standard cosmological model of the universe

Mathematicians are challenging the idea that dark energy is responsible for the accelerating expansion of the universe. In a new paper published in Proceedings of the Royal Society...

Connecting Nuclear Physics Data With Cosmological Observations To Explain Dark Energy and Dark Matter Without New Partic...

Toronto, Ontario, Canada - April 24, 2026 - The Institute of Integrative and Interdisciplinary Research (IIIR) today announced the completion of a two-volume research program that...

Are We at Another Lemaître Moment? Cosmological Evidence Suggests So

The universe is not large in spite of us — it is large, in part, because of what it takes to produce us. Source

What If the Universe Had No Beginning? Part 2: No Boundary, No Problem

Hawking faced a question with no answer hiding behind it. The best boundary condition for the universe, he decided, was that there was no boundary at all. To make that statement in...

In Quantum Gravity, the Cosmological Constant May Behave Similar To The Quantum Hall Effect

The cosmological constant has been a problem in physics since Einstein, but new research may show why it takes the value that it does despite quantum fluctuations that should make...

New Theory Explains How Time Began

The biggest open problem in the foundations of physics is that Einstein’s theory of gravity, General Relativity, does not cooperate with quantum mechanics. Physicists have tried to...

Every Method of Measuring the Universe’s Expansion Rate Agrees, and That’s a Problem

Einstein's Theory Has a Problem -- This Idea Solves It

Physicists have been trying to reconcile the differences between Einstein’s theory of spacetime and our observations of quantum mechanics for almost a century. One way that they’ve...

What If the Universe Had No Beginning? Part 4: The Reckoning

No quantum gravity. The wrong peak in the wave function. Boltzmann Babies. Roger Penrose pointing out that the arrow of time was smuggled in through the back door. The no-boundary...

The local universe's expansion rate is clearer than ever, but still doesn't add up

A new synthesis of astronomical measurements confirms a persistent mismatch that could point to physics beyond current models.

Mapping the hidden structure of the universe

The universe has a hidden structure, and a University of Virginia professor is mapping it in 3D, using 46 million galaxies and quasars and 19 million stars. Satya Gontcho A Gontcho...

A new way to read the Universe

Scientists have developed a new method that could significantly improve our understanding of the expansion of the Universe and the nature of dark energy.

The Universe Is Expanding Too Fast and Scientists Can’t Explain Why

The most precise measurement yet shows the Universe is expanding faster than expected, deepening the Hubble tension. The result hints that something may be missing from our current...

Not so dark with Alena Tensor: Math framework could explain dark matter without invisible particles

Alena Tensor is a relatively new mathematical approach that allows for arbitrary curving and straightening of analyzed spacetimes. As it turns out, generalizing this model to all k...

This New Quantum Theory Could Change Everything We Know About the Big Bang

A new quantum gravity theory suggests the Big Bang may have unfolded naturally—and could soon be testable. Scientists at the University of Waterloo have introduced a new approach t...

A new way to read the universe could sharpen understanding of cosmic expansion and dark energy

An international team led by researchers at the Institute of Cosmos Sciences of the University of Barcelona (ICCUB) has developed a new method that could significantly improve our...