Oct 16, 2025 · 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 …

Since the early 20th century, the field of cosmology establishes that space and time emerged together at the Big Bang 13.787 ± 0.020 billion years ago [10] and that the universe has been …

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 …

Oct 22, 2024 · Around 13.8 billion years ago, the universe expanded faster than the speed of light for a fraction of a second, a period called cosmic inflation. Scientists aren’t sure what came …

As the Universe expanded, the seething plasma of subatomic particles cooled to form hydrogen, the first atoms. Light was able to travel unimpeded through the Universe for the first time, a …

Jan 29, 2025 · The Big Bang Theory stands as the most widely accepted explanation for the origin of the universe. According to this theory, the universe began as an infinitely small, hot, and …

Jul 26, 2025 · The story of how the universe began is the story of how everything came to be. It is not just the domain of physicists and philosophers, but a tale that pulses in the blood of every …

Jul 17, 2025 · At first, the dense, fast-expanding universe was full of superheated electrons and protons whizzing around, creating a sort of murky, searingly hot soup. But roughly 400,000 …

Oct 19, 2025 · Researchers have unveiled a new model for the universe’s birth that replaces cosmic inflation with gravitational waves as the driving force behind creation. Their simulations …

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