According to one idea, dark energy is a fifth and previously unknown type of fundamental force called quintessence, which fills the universe like a fluid. Many scientists have also pointed out ...

Dark energy, the mysterious force that makes up 70 percent of everything in existence, was hypothesized to explain why the expansion of the universe was accelerating. Ever since, it's been ...

Whether we are simply characters in an advanced virtual world is a much-debated theory, challenging previous thinking about ...

There’s more to the universe than meets the eye, he found. His studies led astronomy to the dark side, changing our view of what’s out there. By Dennis Overbye Jeremiah Ostriker, an ...