Space itself expands; a single story ties atoms to galaxies and our own origins.
Clarifies expansion as space growing, not a central explosion, and outlines the theory's scope.
Redshift, standard candles, and dark energy reveal how the universe’s expansion unfolds.
Cosmic microwave background as a near-perfect relic of the early hot universe and its seeds.
Primordial light elements from the hot early universe corroborate Big Bang conditions.
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