Cooking is the practice of heating food so that it's suitable to eat. It's something almost every culture does in some form, and it can be as informal as boiling an egg for your own breakfast or as formal as creating a 12-course meal at one of the top-rated restaurants in the world. No one knows exactly when humans began to cook, but the earliest hunter-gatherers most likely used fire or boiling water to prepare their meat. Native North and South Americans used cooking techniques to remove poisons from potential food sources. As humans moved from hunting and gathering to agriculture, they grew bored with cooking out of necessity as their ancestors did. Because they no longer had much variety in their diets, they began experimenting with different ingredients to make food taste better. Today, cooking is more than just a way to sustain life. It's an art, a science, and a form of entertainment.