Water, water everywhere - but how does it get there?
Brains On! Science podcast for kids
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The Origins of the Universe
14 billion years ago, the entire universe was crammed into a very tiny dot. Then it suddenly exploded out, creating space and time itself. When this explosion happened, it scattered lots of material, most of which was hydrogen. Hydrogen was spread across the universe after the Big Bang. But where did the oxygen come from? I don't know.
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