White hair is characteristic of aging, but colorless hair strands can appear at any age — even while you're still in high school or college. Learn why this happens and what you can do to prevent it.

Poop is normally brown. The color is the result of what you eat and how much bile is in your stool. Bile is a fluid your liver makes to digest fats. It starts out as a yellowish green color.

Chocolate, unsalted butter, and espresso powder: We use 60% cacao chocolate and espresso powder to give the brownies a super rich chocolate flavor.Don’t use salted butter; you’ll add salt later. Brown ...