The first three minutes
From a plasma of quarks to the lightest nuclei — the fastest chemistry the universe ever did.
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Category
Big Bang
Cosmology from the first three minutes to the missing mass problem.
The oldest light we can see
A faint microwave glow in every direction, and the accident that led to its discovery.
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Where the atoms in your bones were forged
Hydrogen and helium came from the Big Bang. Everything heavier had to wait for stars to die.
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Everything is moving away from everything
Redshift, Hubble's law, and why an expanding universe has no centre to point at.
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The missing mass problem
Galaxies rotate too fast for the matter we can see. Something invisible is holding them together.
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