Dec 23, 2025 · While the theory remains widely accepted across the scientific spectrum, a few alternative explanations (such as the steady-state Universe and eternal inflation) have gained …

Feb 12, 2026 · The most widely accepted explanation for the origin of the universe is the big-bang theory, which proposes that the universe began approximately 13.8 billion years ago in an …

Feb 14, 2025 · The question of how the universe began is one of the most profound and captivating mysteries that has intrigued scientists, philosophers, and thinkers for centuries. From ancient …

The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature. Various cosmological models based on the Big Bang concept explain …

May 14, 2024 · Origin of the universe: This article explores various theories about how the universe got started and how it will end.

Jul 17, 2025 · Scientists utilize cosmic microwave background radiation, gravitational wave detection, and particle physics to research the early universe. Our understanding of the universe’s origin is …

Jul 17, 2025 · For 100 years, physicists have tried to unify two leading theories: general relativity, which describes gravity and acts on large scales, and quantum mechanics, which describes the universe …

Jul 26, 2025 · A radical new theory rethinks how the Universe began, using only gravity and quantum physics, no speculative fields or assumptions required. If confirmed, it could reshape our …

Dec 15, 2025 · Explore how Big Bang physics and modern cosmology investigate the origins of the universe, what science can explain about its beginning, and which profound questions remain open.

Though the Big Bang theory cannot describe what the conditions were at the very beginning of the universe, it can help physicists describe the earliest moments after the start of the expansion. …

In order to understand how physics works at a singularity like the Big Bang, we need a theory for how gravity behaves according to quantum theory. Unfortunately, we do not have one. There are a …

Feb 16, 2026 · Aug. 13, 2025 UC Santa Cruz physicist Stefano Profumo has put forward two imaginative but scientifically grounded theories that may help solve one of the biggest mysteries in physics: the …

For example, in some other theories the Big Bang was a result of a bounce from a Big Crunch of the entire universe. Scientists at the Institute for Theory and Computation work to propose new …

As we have noted, up until that time, the assumption of a static universe had always been taken for granted. To put things into perspective, for most of history (see the section on Cosmological …

Definition of Cosmology Cosmology can be defined as the scientific study of the large scale properties of the universe as a whole. It encompasses the origin, evolution, structure, and eventual fate of the …

Feb 16, 2026 · The theory of inflation was proposed by Alan Guth, Andrei Linde and others in the 1980s to explain why the universe’s matter and energy are so smoothly distributed on the largest scales.

Jan 18, 2017 · How did the universe begin—and what were its early days like? The most popular theory of our universe's origin centers on a cosmic cataclysm unmatched in all of history—the big …

Oct 27, 2023 · The universe, with its vast expanse of galaxies, stars, and cosmic phenomena, has always captivated human imagination. How did it all begin? This question has driven scientific inquiry …

Jan 29, 2026 · Discover the universe: Learn about the history of the cosmos, what it's made of, and so much more.

2 days ago · If the Hubble tension cannot be resolved, it may be telling us something new about the early universe. All the various possible solutions to the Hubble tension include modifying the theory …