Mystery of the Hidden Universe

How much more is there to the Universe than meets the eye? In this episode, we join the scientists who hunt for our hidden cosmos. In New Mexico, radio astronomers probe the cold and seemingly empty void of space to uncover vast clouds of hidden matter called intergalactic plasma. But astronomers now realize that our universe has a 'dark side' - a second kind of matter and a mysterious 'energy' that together make up most of the universe. We join teams in the UK, Italy and the United States hunting for so called dark matter and dark energy. We go behind the scenes at ...