When we look up at the night sky, we see a sea of stars - but although there are trillions of light sources in space, the entirety of the cosmos appears dark! How can this be? The REAL reason why space is dark will surprise you. This apparent discrepancy in the night sky, known as Olbers' paradox, raises questions that have intrigued astronomers for centuries. The answer lies hidden deep within the foundations of our universe, revealing secrets about its structure, age and the nature of light itself.