Curious Kids is a series for children of all ages. If you have a question you'd like an expert to answer, send it to ... .</ ...

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Surrounded by the black background, it becomes clear that the circle is merely dark gray. Even when you know the circles are the same, it’s hard to believe because the effect of the surrounding ...

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Is it possible to understand the Universe without understanding the largest structures that reside in it? In principle, not ...

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