Within a month of the Big Bang, a second cosmic explosion may have given the universe its invisible dark matter
The Big Bang may have been accompanied by a shadow,"Dark" Big Bang that flooded our cosmos with mysterious dark matter, cosmologists have proposed in a new study. And we may be able to see the evidence for that event by studying ripples in the fabric of space-time.
But there's another ingredient to the cosmological mix: dark matter. Once again, cosmologists aren't sure what dark matter is, but they see the evidence for its existence through its gravitational influence on normal matter. In this new scenario, the Dark Big Bang only gets underway after inflation fades away and the universe expands and cools enough to force the dark field into its own phase transition, where it transforms itself into dark matter particles.
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