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How come in cold weather your nose runs and your eyes tear?

How come in cold weather your nose runs and your eyes tear? Also, how come when you put milk on puffed rice cereal, it makes a popping sound? asks Emily Abrams, a student at Long Island Lutheran Middle School, in Brookville,

NY. Winter is notorious for its dry air. And yet, when it comes to [...]

How come, if you put water and oil together, the water will rise and the oil will sink?

How come, if you put water and oil together, the water will rise and the oil will sink? asks Walton Rea, a student in Brookville, NY.

Actually — although it seems unlikely — the opposite occurs. It’s oil that does the rising. Just check out any oil-and- vinegar salad dressing in your refrigerator. (Note: vinegar [...]