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What is a Black Hole?

What if you crushed the entire Earth down to the size of a marble — without losing a single ounce of its mass? That’s not science fiction. That’s the kind of density we’re dealing with when we talk about black holes. In this video, we break down what black holes actually are, where they come from, and why their gravity is so extreme that not even light can escape. From dying stars and supernovae to event horizons, spaghettification, and warped time itself, we explore black holes using simple ideas, clear analogies, and zero unnecessary math.