The type of matter we’re familiar with and encounter everyday - atoms and molecules - only makes up about 5 percent of the universe. The remaining 95 percent is believed to be dark matter and dark energy. Current research continues to puzzle scientists as controversies arise over these invisible yet dominant substances. Explore the history of dark energy and dark matter by following Einstein’s path to uncovering the theory that sparked a change in the world of astrophysics and the controversies behind that theory. Was Einstein wrong? Will we ever know if dark energy and dark matter really exist? Join Physicist Sean Carroll, a senior research associate at the California Institute of Technology, in this lecture that sheds light on the “dark side” of the universe that may actually be the key to unlocking the mystery that is the universe. From the Series:Frontier