(CNN) — More cell phones have more features and capabilities than ever — but often the tradeoff is shorter battery life. This is especially true of smartphones. I know many, many users of all kinds of smartphones, and it’s rare that they get a full day of use out of a full charge. So it’s… Read More

Coffee contains a complex mixture of chemical compounds. Some components, particularly those related to the aroma, are produced during roasting of the green beans. The substances which during “brewing” dissolve in water to form the beverage are classified as nonvolatile taste components (including caffeine, trigonelline, chlorogenic acid, phenolic acids, amino acids, carbohydrates, and minerals) and… Read More