We are surrounded by dark matter and dark energy. Mysterious forces that permeate the universe and play a fundamental role in determining its evolution. Scientists can observe the effects of these cosmic enigmas. But as yet, they have found nothing.

Space, an infinite vastness. But there's nothing in it. In a volume of about 13,000 by 13,000 by 13,000 kilometers, which is roughly the volume of the earth, there's the mass equivalent of a small grain of sand. Not only that, when you examine this grain of sand, you find it consists of ghostly particles. Particles that pass through everything without leaving behind a trace. And then there's dark energy. What exactly are dark matter and dark energy?

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