Coffee is decaffeinated by soaking green (unroasted) coffee beans in water or a chemical solvent to remove caffeine, then the beans are dried and roasted normally. There are several different methods used commercially, each removing about 97% of the caffeine.

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Extra virgin olive oil is made from the first pressing of olives and has no chemicals added, while regular olive oil is refined and often blended with other oils. Extra virgin has a stronger flavor and lower smoke point, while regular olive oil is more neutral and better for cooking at high temperatures.

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Scientists believe we dream to help our brains process emotions, consolidate memories, and maintain mental health. Dreams occur naturally during REM (Rapid Eye Movement) sleep, when the brain is highly active.

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Tax brackets are ranges of income that are taxed at different rates, so as your income increases, different portions of it are taxed at progressively higher percentages. You don't pay one single tax rate on all your income; instead, each bracket is taxed at its own rate.

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Stocks represent ownership shares in a company, while bonds are loans you give to a company or government that they promise to pay back with interest. When you own stock, you own part of the company; when you own a bond, you are a lender.

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