Dark energy may be even less understood than dark matter, but scientists do know that dark energy serves an important role in accelerating the universe's growth, especially in recent cosmological history. (science.howstuffworks.com)
Google «red shift accelerating universe» if you want to read about something that was discovered in 1998 and kept hush - hush to this day. (religion.blogs.cnn.com)
That could slam the door on answering mysteries such as why gravity is so weak, or how mysterious dark energy is apparently accelerating our universe's expansion. (newscientist.com)