Scientists accidentally kill world's oldest animal at age 507. The oldest animal ever known lived from 1499 until the day researchers cracked its shell open, killing it in the process.
For example, there is a federal law (and similar laws in every state) allowing consumers to cancel contracts made with a door-to-door salesperson within three days of signing. You might use that law after hastily agreeing to have someone repave your driveway, deliver lawn fertilizer, or put a new roof on your house.
Only certain types of contracts come with a 3-day right of rescission, such as health club contracts or some sales of goods or services made at your home. In order to cancel such a contract, you must give written notice of cancellation to the seller within 3 business days of your signing the cotnract. A lawyer will be able to tell you if a particular contract comes with such a right to cancel. Often the word consideration is found in agreements.