7 STRANGE Mysteries of Space !

From dark energy and dark matter, to space flight, these are 7 STRANGE Mysteries of Space ! HEY YOU ! There are more awesome videos being made every week, like and subscribe to World Unearthed so you don't miss a beat ! 7. The Great Dark Void | Empty Space in Space ? 6. Dark Matter | Primordial Black Holes What is matter? Its any substance that has mass and volume. What is dark matter? No one knows really. It is a hypothetical, massive, exotic, particle. But hey, if it wasn’t for

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