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原文：Earwax is actually a self cleaning mechanism that traps dust and slow...
原文：Trees growing under streetlights sometimes keep their leaves longer b...
原文：Yawning is contagious even across species, and some scientists think ...
原文：Most apples in the supermarket are at least a year old, kept in clima...
原文：Your phone doesn't store an actual image of your fingerprint but a ma...
原文：The close door button in most elevators doesn't actually work; it's j...
原文：Bananas are naturally radioactive due to their potassium content, tho...
原文：I read that the air inside subway tunnels is full of fine metal parti...
原文：Every atom in our bodies was forged inside a star that exploded billi...