Chemicals from our phone and TV screens are accumulating in the brains of endangered dolphins and porpoises. New research shows these "liquid crystal monomers" from e-waste can cross the blood-brain barrier and may disrupt DNA repair, highlighting the growing impact of electronics on marine life.

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* @param n 数组长度

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Why conspiracy theories can be so irresistible: people who prefer structured, rule‑based explanations may find conspiracy theories appealing because they offer a clear, ordered explanation for events that feel chaotic

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- satisfiable: Boolean. True if the formula is satisfiable