Through the Wormhole (2010)

S5E9 Is There a Shadow Universe?

Gazing at the night sky, it seems we inhabit a universe brimming with light. However, scientists are convinced that a significant amount of matter lurks in the dark regions that remain invisible and intangible to us. This hidden presence is shrouded in mystery. Cosmologists acknowledge that "dark matter" has played a crucial role in the formation of our universe, but the challenge now is to uncover its true nature. What lies within this concealed realm? Is it possible that it has given rise to dark stars, planets, or even life? Could this Shadow Universe pose a risk to our luminous world?