what di u mean by big-bang theory
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About 14 billion years ago, the universe materialized out of nothing for unknown reasons. Infinitely smaller than an atom to begin with, the universe expanded to a trillion kilometres across a second- an event called the big bang.
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the most popular theory of our universe's origin centres on a cosmic cataclysm unmatched in all of history_ the big bang . this theory was born of the
observation that other galaxies are moving away from our on at great speed, in all directions as if they
observation that other galaxies are moving away from our on at great speed, in all directions as if they
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