Here are a few useful facts about a breakfast staple, the egg: 1. Most eggs are laid between 7:00 and 11:00 am, so that's the best time to get them fresh from the market.2. A spoiled egg will float on water.3. To determine whether an egg is cooked or not without cracking it, spin it on a flat surface. A cooked egg will spin quickly; the yolk of a raw egg will weigh it down.4. To peel a hard-boiled egg easily, immerse it in cold water for a few minutes immediately after cooking. 5. If you put an egg in the palm of your hand and try to squeeze it, it will be almost impossible to break. Its unique shape gives it tremendous strength.