Dark Energy. We think it exists. We think it accounts for about 70 percent of our reality. This mystery force can give us the solution to the Universe's final destiny, but we are just beginning to understand it, according to Mordecai-Mark Mac Low at the American Museum of Natural History.
In the last century, we've learned that the universe is expanding. Dark energy, which accounts for about 70 percent of the stuff in the universe, is the mysterious phenomenon accelerating this expansion.
So what do we know about dark energy? Watch this brief history featuring Curator Mordecai-Mark Mac Low.