This was
your sky.

Antarctica Hears Little Normal Matter in the Big Bang

On the frozen ice near the bottom of the world, sophisticated instruments listen for a precise echo of how our universe started. Three independent collaborations announced evidence that overtones heard are consistent with our universe having only about five percent normal matter. The remaining 95 percent is dark matter or dark energy. This amount of normal matter was expected if our universe underwent a particularly explosive early phase of the Big Bang.