Dark energy has been described as everything from a fifth force to a new form of matter, but so far, no direct evidence has been found of its existence. Noble Prize winning physicist Adam Riess says: “I have absolutely no clue what dark energy is…

Source: https://dailygalaxy.com/2020/01/the-massive-elephant-in-the-room-new-theory-says-no-need-for-dark-energy/