“We are back to the standard discussions. What is dark matter? Indeed, we are running out of good options,” said Uroš Seljak, a UC Berkeley professor of physics and astronomy and BCCP co-director. “This is a challenge for future generations.”
In the art world, there’s a term called pentimento, meaning an alteration, an overlay on a painting, hiding evidence of traces of a previous work. In a similar vein, British physicist and former Stephen Hawking colleague, Sir Roger Penrose and his team, argue is that extinct universes exist that were filled with ghost black holes that are hidden, embedded in the Cosmic Microwave Background map.