Big Bang

The expanding universe.

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Big Bang: The expanding universe.

The expanding universe.

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BIG BANG

Featured Story

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Science

Story

~2.4 Billion Years Ago

Great Oxidation Event: Third Atmosphere

Cause: Cyanobacteria Produce Oxygen

Evolution

By 2.4 billion years ago, evolving oxygenic photosynthesis, Cyanobacteria unlocked an infinite energy source: water and sunlight. This success flooded the atmosphere with oxygen, a toxic gas that wiped out most anaerobic life (the Great Oxidation Event) but created the high-energy environment necessary for the later evolution of complex animals and plants.

Featured Quote

Featured FAQ

Updated This Week

Science

FAQ

Is the Big Bang singularity scientific or philosophical?

Philosophers: "It’s all speculation."

Scientists: "We’re working on it!"

Big Bang Singularity

The expansion of the universe is solid science. The singularity is not. It marks the point where our equations stop working, not where we suddenly know what “began everything.” Calling that boundary scientific certainty confuses mathematical breakdown with physical reality. Good thinking separates evidence from speculation without pretending speculation is failure.

The Expanding Universe

Observation before speculation.

The Big Bang is not an explosion in space, but the expansion of space itself. Galaxies recede, light stretches, and the cosmic microwave background preserves a faint afterglow of an early, hotter state. This section focuses on what we can measure — redshift, background radiation, large-scale structure — and how these observations map the universe’s growth over billions of years.

Deep-Dive Articles

Planets Galaxy Science Fiction Wallpaper Beauty Deep Space Cosmos Physical Cosmology Stock Photos.

Big Bang Structure Unification

The End of the Universe Explained

Michael Alan Prestwood March 22, 2024

We do not know the ultimate fate of the universe, but the leading ideas are that it expands forever, collapses and starts over, or ends in something more extreme.

big bang, black hole, supermassive star, galaxy, cosmos, physical, science fiction wallpaper.

Astronomy

The Expanding Universe Explained

March 15, 2024

ΛCDM remains the leading cosmological model because our current best measurements indicate gravity is not strong enough to stop the universe’s expansion.

February 4, 2026

“It was an act of despair, to sacrifice physics for the sake of finding an explanation.”